For how we live.
The government is gathering evidence to build step-count and muscle-strengthening guidance into the Physical Activity Guidelines for Americans, a supplement to the 2018 edition. Written comments close 12 November 2026.
Heartburn is one of the most common complaints in pregnancy. Diet and posture changes come first; a Cochrane review found antacid-type medicines relieve it, but the trial evidence is thin and drug choice needs care.
An overactive thyroid speeds the body up; an underactive one slows it down. But no single symptom is reliable — in one large screening study, individual thyroid symptoms were poor at flagging who actually had a problem.
Guidelines set weight-gain ranges by starting BMI, not a doubled appetite. A large meta-analysis links gaining outside those ranges to worse outcomes at both ends — smaller and larger babies alike.
In the publicly funded EPoS II trial, waiting five years before the next colonoscopy was no worse than the recommended three at an interim look, with near-identical cancer rates. Ten-year data are still to come.
Acute otitis externa is usually treated with ear drops, not tablets. In trials antibiotic-steroid drops cured most people, and guidelines say not to start with oral antibiotics for an uncomplicated case.
The flaky, red patches on scalp, brows and nose folds are an inflammatory reaction, not poor hygiene. Ketoconazole cream cut treatment failure 31% against placebo, and short steroid courses tripled clearance.
Danger lies at both ends. Below 70 mg/dL blood sugar is too low; sustained highs can tip into ketoacidosis above 200 mg/dL or a hyperosmolar crisis above 600. Both extremes are medical emergencies.
Chronic hives are mast-cell driven and usually have no external trigger. Antihistamines clear some cases; at 12 weeks omalizumab cut a weekly itch score by 9.8 points at 300 mg, against 5.1 on placebo.
A four-image bitewing set delivers about 5 microsieverts, a panoramic scan 14 to 24. A cone-beam CT can be tens of times higher. The dose is small, but technique and how often you scan drive it more than anything.
For hay fever and year-round allergy, the pill most people reach for is not the strongest option. A meta-analysis found steroid nasal sprays beat oral antihistamines across nasal symptoms — most of all a blocked nose.
Disordered eating is far more common in adolescents than most parents realise, and weight is a poor guide. A pooled analysis found about 22% of children and teens screen positive, and girls far more than boys.
Hoarseness affects nearly a third of people at some point. Most cases are viral and settle on their own; voice therapy helps persistent ones, and a voice change lasting weeks needs a look at the vocal cords.
For most women without complications, activity in pregnancy is safe and beneficial. Trials link exercise to lower odds of gestational diabetes and high blood pressure, with a rough dose to aim for.
The 2024 American Academy of Sleep Medicine guideline strongly backs intravenous iron and gabapentinoids, and now suggests against the dopamine agonists that were first-line for two decades.
Urinary infections in men were long treated as automatically complicated. A randomised trial found seven days of antibiotics non-inferior to fourteen, and guidelines say not to treat urine that causes no symptoms.
Gout affects about one in twenty American men, driven by high uric acid. Guidelines and randomised trials back long-term urate-lowering to a target below 6 mg/dL, yet only a third of patients receive it.
The TRAVERSE trial cleared its cardiovascular safety in 5,246 high-risk men; the Testosterone Trials found a real but moderate sexual-function benefit. Guidelines reserve it for genuine, twice-confirmed deficiency.
US preventive guidance recommends against a resting or exercise ECG in symptom-free adults at low cardiovascular risk, and finds the evidence insufficient at higher risk. The tracing rarely changes treatment.
It is not a routine test for everyone — the USPSTF finds the evidence insufficient. Cardiology guidelines back it for one group: intermediate-risk adults weighing whether to start a statin.
If a choking person can still cough or speak, let them cough. If they cannot, the guideline sequence is five back blows then five abdominal thrusts, repeated — and new data suggests bystander action changes who survives.
A network meta-analysis of 118 trials and 31,195 men found every oral PDE5 inhibitor beat placebo, with tadalafil ranked most effective. Guidelines make the tablets, after a health check, the first-line choice.
A randomised trial found ordinary ibuprofen cut acute mountain sickness from 69% to 43% on a fast ascent. A Cochrane review found most supplements and pre-acclimatisation gadgets do not hold up.
The global target is an average of 60 minutes a day of moderate-to-vigorous activity, plus muscle-strengthening. Most adolescents miss it: in 2016, 81% worldwide were insufficiently active, and girls more than boys.
Overactive bladder means urgency, often with frequency and night-time waking. Guidelines start with bladder training and fluid habits, and reserve drugs and procedures for when those fall short.
The commonest cause of spinning dizziness is loose inner-ear crystals. In trials the Epley manoeuvre cleared vertigo in 56% of people versus 21% with a sham, and guidelines advise against reaching for drugs.
US preventive guidelines back a blood-sugar test for adults 35 to 70 who carry extra weight; the main diabetes body would test every adult from 35. The gap is about how wide a net catches enough real disease.
At one year, 79% of newly diagnosed patients given early infliximab plus an immunomodulator were in steroid-free, surgery-free remission, versus 15% treated conventionally.
Nausea in early pregnancy is common and usually mild. Ginger has the best trial support for nausea, vitamin B6 and doxylamine are options, and acupuncture shows no clear benefit.
The chronic skin disease is often missed for years. In a cohort of 507 women, those who kept up topical steroid treatment developed no vulval cancers; those who did not had a 4.7% rate.
A fear that shaped urology for decades held that raising testosterone feeds prostate cancer. Randomised trials and a large 2024 safety analysis find no such rise in screened men.
It anchors every male-infertility evaluation, but its reference numbers come from a few thousand fertile men — and a normal result never rules fertility in or out.
European screening cut prostate-cancer deaths by 21% at 13 years, at the cost of overdiagnosis; a UK trial of a single test found no mortality benefit. US guidance now makes it a personal choice for men 55 to 69.
Acne is not caused by dirt or bad washing, and it does respond to treatment. Guidelines strongly back benzoyl peroxide and topical retinoids first, with oral isotretinoin reserved for severe or scarring acne.
Croup gives young children a barking cough and noisy breathing. It is usually mild and self-limiting, and a single dose of oral steroid shortens it — with a low dose working about as well as a high one.
Stones form when urine gets too concentrated. The best-tested defence is dull: drink enough that urine stays dilute. In one trial, that alone roughly halved recurrences.
A randomised trial and a 21-study meta-analysis found thyroid hormone normalised the blood test but left tiredness and symptom scores unchanged. A guideline now advises against routine treatment.
H. pylori infection and NSAIDs are the two most common causes of peptic ulcers. Treatment now turns on antibiotic resistance, which is quietly reshaping the first-line regimens.
The old RICE drill was never built on strong trial evidence, and newer guidance drops the ice and anti-inflammatories. The durable parts are protection, gentle loading and time.
The evidence-based first move for a burn is unglamorous: hold it under cool running water. A large registry study links proper cooling to fewer skin grafts and ICU admissions; ice and butter belong nowhere near it.
Haemorrhoids affect about 1 in 20 Americans and half of over-50s. A meta-analysis found fibre cut the risk of persisting symptoms by 47 percent and of bleeding by half.
Gallstones affect 10 to 15 percent of Americans, but stones that never block a bile duct cause no symptoms. Here is when a stone stops being harmless and becomes an emergency.
Two large trials, ETHOS and IMPACT, found adding an inhaled steroid to a two-bronchodilator inhaler lowered exacerbation rates in COPD — at the cost of more pneumonia.
A harmonised meta-analysis of over a million adults found 60 to 75 minutes of daily moderate activity erased the extra death risk tied to sitting more than eight hours. The catch is how much activity that is.
Most acute sinus infections clear without antibiotics — about 46% of people are better within a week regardless. Drugs speed cure in only 5 to 11 per 100, and cause side effects in more.
In FINEARTS-HF, 6,001 patients with an ejection fraction of 40% or more had fewer worsening-heart-failure events on finerenone. Cardiovascular deaths were not lower.
Most bad breath starts in the mouth. Cochrane reviews found tongue scraping cuts odour compounds only briefly, and the rinses that work best also stain the teeth.
US guidelines recommend a one-time ultrasound for men aged 65 to 75 who ever smoked, and advise against it for most women. The split turns on who actually benefits from finding a silent bulge in the aorta.
Nocturia is usually blamed on the prostate, but the commonest driver is the kidneys making too much urine overnight. In one trial, low-dose desmopressin trimmed nightly voids and bought about 40 extra minutes of sleep.
Real deficiency shows as bone pain, muscle weakness or, in children, rickets. But US surveys suggest most people meet their needs, and both a 2011 and a 2024 review advise against routine testing in healthy adults.
For most children with gastroenteritis, the treatment is oral rehydration fluid at home — not a drip, and not stopping fluids. Here is what the evidence shows works, and the warning signs that mean a doctor now.
An umbrella review of 41 systematic reviews found sitting, standing and 'bad' posture are at most weakly and inconsistently linked to low back pain — and none of it establishes that posture is the cause.
When brief vertigo is triggered by rolling over or looking up, it is usually a loose crystal in the inner ear. A Cochrane review found a repositioning manoeuvre resolved it in 56% versus 21%.
EPoS II randomised 10,799 people with high-risk adenomas to a first surveillance colonoscopy at five years or three. At an interim analysis the colorectal-cancer rates were near-identical.
Common advice says scrape a bee stinger out, never pinch it. The actual evidence says the method barely matters — what counts is speed, because venom keeps pumping every second the stinger stays in.
Cognitive behavioural therapy is one of the few non-hormone options the North American Menopause Society backs at its top evidence level. What it changes is how much flushes bother you, not the thermostat.
Chronic hives can flare for months with no allergy to find. A Cochrane review of 9,759 people found modern antihistamines such as cetirizine clear them in a minority, not everyone.
Guidelines settle on a limit near 200 mg a day — roughly two mugs of coffee. But the underlying studies are observational, and a vocal minority argues there is no clearly safe level.
For adults with no symptoms, the US Preventive Services Task Force recommends against carotid ultrasound screening — a rare 'D' grade, because finding the narrowing does more harm than good.
The 2024 AASM guideline now advises against routinely using the dopamine agonists that were once standard, because over time they often make the condition worse — and puts anticonvulsants and iron first.
Testosterone raises desire mostly in men whose levels are genuinely low, and the effect is modest. In the largest trial, the size of the hormone rise, not a threshold, tracked with benefit.
No cream, pill or gel reverses a sunburn or shortens it. Cool compresses, moisturizer and painkillers ease the days it lasts; the burn itself is UV damage that heals on its own.
Most constipation in children has no underlying disease. Guidelines say the treatment that works is a laxative — clearing the backlog, then a maintenance dose for weeks — not simply adding fibre or fluid.
There is no established safe amount, and UK and US authorities advise not drinking at all. Heavy drinking clearly causes fetal alcohol harm; the data on light drinking are genuinely sparse, not reassuring.
Cohorts link both to modestly higher rates of heart disease and early death, on low-certainty evidence. A 2019 guideline then told people to keep eating them — and split the field over how to weigh nutrition science.
The official figure is 0.8 grams per kilogram of bodyweight a day — but that number is a floor to prevent deficiency, not a target for optimal health, and that distinction drives most of the argument.
Health authorities converge on a ceiling — under 10% of daily calories, and lower is better still. Large cohorts single out sugary drinks as the form most clearly tied to dying earlier.
A Cochrane review of 48 trials found treatment may lift pregnancy rates from about 21% to 22–48%, but couldn't confirm a live-birth benefit. Microsurgery had the fewest recurrences.
A child with a suspected concussion should be removed from play and not return the same day. But prolonged strict rest is no longer advised, and light activity within days can speed recovery.
The largest study, comparing siblings to strip out family confounding, found no link between paracetamol in pregnancy and autism or ADHD. Guidelines still call it the preferred painkiller when one is needed.
Guidelines now ask for an objective test before an asthma label is fixed to a child, and inhaled steroids remain the mainstay of control. Their benefit is real; so is a small, mostly temporary effect on growth.
Paediatric bodies advise formal autism screening at 18 and 24 months; a US task force found the evidence for universal screening merely insufficient, not against it. Large studies find no link to vaccines.
A short course of a first-line antibiotic clears most uncomplicated UTIs. Five-day nitrofurantoin beat single-dose fosfomycin (70% vs 58% resolution), and two-thirds of women recovered on ibuprofen alone.
Modern techniques fail less than 1% of the time. The best meta-analysis found no link to aggressive or fatal prostate cancer; a 2-million-man registry still sees a small excess, most likely from extra testing.
Exogenous testosterone switches off the body's own signals to the testes. In a male-contraceptive trial, 95.9 per 100 men fell to near-zero sperm counts. The effect is usually, but not always, reversible.
The old antidepressant is prescribed at low doses for insomnia far more than its evidence supports. A Cochrane review found only a modest, low-certainty effect on subjective sleep and none on measured sleep efficiency.
In the 500-man PRECISION trial, MRI-guided biopsy detected clinically significant cancer in 38% of men versus 26% with the old blind biopsy — and spared 28% a biopsy altogether.
New guidelines set how the program, launched in July 2025, screens people aged 50 to 70 with a 30 pack-year smoking history using two-yearly low-dose CT scans.
In the largest trial, combining fluoxetine with talking therapy helped most, and both worked better than placebo. A later network analysis found only fluoxetine, alone or with therapy, clearly beat placebo.
One in five people get chronic itch at some point. When no rash and no cause turn up, a Cochrane review found almost no trials at all — leaving guideline experts to work from indirect evidence.
Alpha-blockers ease symptoms within weeks; 5-alpha-reductase inhibitors shrink the gland over months. In a 3,047-man trial, combining them cut progression risk by 66%. Newer office procedures spare sexual function.
Enuresis alarms have the best evidence for a lasting cure, working in about two-thirds of children who use them. Desmopressin acts faster but the wetting tends to return when it stops.
Out-of-office readings predict heart attacks and death better than a clinic measurement, and guidelines now require them to confirm hypertension — but only a validated upper-arm cuff counts.
Most sore throats clear on their own within a week. Painkillers and honey ease the pain; antibiotics shorten symptoms by only about 16 hours and are rarely worth it.
A, B, C, D and I are not school marks. They encode how strong the evidence is, whether to screen at all — and in the US, whether insurance has to pay for it.
A Cochrane review of 79 trials and 24,308 patients found the primary-care model helps with depression and anxiety, modestly in the short and medium term and not at all in the very long term.
Most acute ear infections settle on their own, and antibiotics barely change symptoms in the first day. Their benefit is real but modest, which is why guidelines allow a short period of watchful waiting.
There are more than 18 million cancer survivors in the US, and finishing treatment is not the end of the health story. The strongest evidence for what helps is also the most ordinary.
Applying the 2025 AHA/ACC guideline to a Nigerian survey sharply raised the share classified hypertensive versus older criteria, widening the gap between diagnosis and treatment capacity.
Intensive family-based behavioural programmes produce small, real cuts in children's BMI; the newer weight-loss drugs produce much larger ones, but the weight returns when they stop.
A stool test at home and a colonoscopy are both recommended options with different trade-offs. The starting age fell to 45 because the disease is rising in younger adults.
US guidelines now let women aged 30 to 65 screen every five years with an HPV test. One major body would make that the primary test from age 25 — and self-collected samples work about as well.
The professional guideline now frames recovery as an ongoing process through at least 12 weeks, and one pelvic-floor study found birth injuries still resolving a full year after delivery.
A 200,000-woman trial found that screening caught more early-stage disease. It did not save lives — a result that explains why guidelines recommend against screening the general population.
Hospital admissions for food anaphylaxis in the UK rose 5.7% a year for two decades while the case fatality rate fell. The treatment recommendations have almost no randomised evidence behind them.
The disease is lethal largely because it is found late. That is also why guidelines recommend against screening the general public — the evidence says it would do more harm than good.
An umbrella review of the meta-analyses puts the association at RR 1.45. The AUA's guideline treats ED as a risk marker, and classes shockwave, stem cell and PRP therapy as investigational.
Two large randomised trials found low-dose CT screening cut lung-cancer deaths in heavy smokers. The eligibility rules are narrow, and the reason is written into the evidence.
A Cochrane review of 50 trials found cranberry products lower UTI risk in women with recurrent infections and in children, but no benefit in the elderly, in pregnancy, or in bladder-emptying problems.
A joint AGA and ACG guideline graded ten treatments for chronic constipation. The cheap osmotic laxative and the newest secretagogues sit in the same recommendation tier.
Stage describes how far a cancer has spread at diagnosis. It is not the same as grade, it is set once, and it drives both prognosis and treatment more than almost any other number.
A Cochrane review found sit-stand desks reliably reduce workplace sitting, but graded the evidence low quality and could not tie it to better health. WHO backs cutting sedentary time but set no number.
Hormones, surgery and painkillers can reduce pain and improve fertility, but none reliably alter the disease itself — and even removing the uterus does not guarantee the disease goes with it.
Adding an inhaled steroid to the as-needed inhaler roughly halved severe attacks against a short-acting reliever, at a fraction of the daily steroid exposure that maintenance therapy delivers.
The trend stacks mouth tape, magnesium, trackers and a 'sleepy girl mocktail'. Sleep physicians say one unglamorous treatment carries the evidence; most of the rest is theatre.
The 2023 global guideline puts lifestyle first for everyone, letrozole first for fertility, and the pill for cycles and excess hair — while rating much of its own evidence low to moderate quality.
US guidance recommends mammography from 40. A Canadian review of the same randomised evidence put the benefit at 0.27 fewer breast cancer deaths per 1,000 women aged 40-49 over ten years.
A Cochrane review of 11 trials found flight stockings sharply cut silent deep-vein clots. But across nearly 2,900 passengers, the trials recorded no pulmonary embolism, death, or symptomatic clot at all.
In a trial of 1,643 men, prostate cancer killed 3.1% of the monitored group and 2.2% of the surgery group — a difference the trial could not distinguish from chance. Metastases were twice as common.
That is the 23-year result from the largest randomised trial. A 2026 Cochrane review of 789,086 men rates the mortality benefit moderate-certainty and the harms largely unmeasured.
Two Cochrane reviews back scopolamine and first-generation antihistamines for preventing motion sickness. Both found the same gap: not a single randomised trial has looked at relieving symptoms already under way.
Bloating and visible distension are different problems with different mechanisms. The 2025 ESNM/UEG consensus found visceral hypersensitivity, not gas volume, doing most of the work.
Two American guideline bodies grade cognitive behavioural therapy for insomnia as a strong recommendation. Every drug in the sleep-medicine guideline — the ones it endorses and the ones it rejects — came out weak.
Expert guidelines back antibiotics for moderate-to-severe cases and simple measures for mild ones. The popular Pepto-Bismol prevention habit rests on 1980s data — and a 2025 trial could not confirm it worked.
A dose-response meta-analysis of 94 cohorts and more than 30 million people found the steepest part of the curve sits between zero and the recommended weekly dose, with small and uncertain gains above double it.
A 160-study meta-analysis found real but moderate symptom reductions while patients are on treatment. The evidence for lasting benefit after stopping is much thinner, and rests mainly on grass.
A Cochrane review of 64 trials found acetazolamide cut the risk of acute mountain sickness by about half. It is a genuine drug effect, not a folk remedy — and it is a prescription decision, not a supplement.
A network meta-analysis found six treatments clearing the clinically important threshold in the short term. It also graded 98.6% of the evidence very low certainty, and found nothing that held up past a year.
The numbers most methods advertise are perfect-use figures from clinical trials. In everyday use the pill fails about seven users in 100 a year, the condom about 13, withdrawal about 20.
The number most people quote is not the number the American Academy of Sleep Medicine and Sleep Research Society agreed on. Their recommendation is a floor, set by expert vote rather than by trial.
A Cochrane review found melatonin reduced jet lag in nine of ten trials. Sleep medicine's own guideline rates it a first-tier option for jet lag disorder. Take it at the wrong hour and it can make things worse.
Six randomised trials found no benefit from immediate imaging over usual care. A separate review explains the reason: most of what a scan finds is present in people with no pain at all.
The American College of Gastroenterology suggests a positive diagnostic strategy over a diagnosis of exclusion, with two blood and stool tests doing most of the ruling-out that is actually warranted.
Guidelines say earwax that causes no symptoms should be left untreated. When wax truly blocks the ear, drops, irrigation or clinician removal help, but ear candles, when tested, removed no wax and caused injuries.
The nosebleed guideline first move is specific: firm, sustained pressure on the soft lower third of the nose for at least five minutes. Most settle this way; the treatments people escalate to have thin evidence.
For years the disorder was treated off-label. A phase 3 randomised-withdrawal trial won lower-sodium oxybate the first US approval for it — but its design measures what is lost on stopping.
The ADA's 2026 Standards of Care add guidance on individualising obesity-drug dosing, name two eating patterns for type 2 diabetes prevention, and recommend continuous glucose monitoring from diagnosis.
The recommendations are conditional, cover three drugs, and come with a projection that fewer than one in ten people who could benefit will have access by 2030.
The 27 recommendations cover monitoring, diet and medication for type 1, type 2 and gestational diabetes. WHO had guidance on diabetes and guidance on pregnancy, but never on the two together.
The recommendation covers people weighing at least 35 kg and rests on two trials in which lenacapavir cut HIV infections by 100% and 96% against background incidence.
ALEG's position holds that testosterone in postmenopausal women should be limited to hypoactive sexual desire disorder, and that pellets and compounded formulations are not recommended.
An EMAS clinical guide sets out how to manage endometriosis after menopause, advising against oestrogen-only hormone therapy even in women who have had a hysterectomy.
The guidelines pair the new injectable with a second, quieter recommendation: use simplified rapid diagnostic testing to start and continue long-acting PrEP, rather than more complex assays.