Children's ear infections: what antibiotics do, and when waiting is reasonable

Most acute ear infections in children get better without antibiotics, and in the first 24 hours antibiotics do not measurably reduce pain [s2]. Their benefit is real but modest and arrives over several days, which is why professional guidelines endorse a short period of watchful waiting for many children rather than an automatic prescription [s1]. Understanding the size of that benefit is what makes the choice between treating and waiting a reasonable one rather than a gamble.

What the trials show antibiotics do

The most reliable summary is a Cochrane review that pooled 13 randomised trials comparing antibiotics with placebo, covering 3,401 children and 3,938 episodes of acute otitis media, all from high-income countries and generally at low risk of bias [s2]. Its headline finding is easy to misread and worth stating carefully: by 24 hours after treatment began, about 60% of children had recovered whether they received antibiotics or placebo, and pain at 24 hours was not significantly reduced by antibiotics (risk ratio 0.89, 95% confidence interval 0.78 to 1.01) [s2].

The benefit shows up later, and it accumulates. Roughly a third fewer children had residual pain at two to three days (RR 0.70, 95% CI 0.57 to 0.86), a quarter fewer at four to seven days (RR 0.76, 95% CI 0.63 to 0.91), and two-thirds fewer at 10 to 12 days (RR 0.33, 95% CI 0.17 to 0.66) [s2]. Translated into numbers needed to treat, that is one extra child free of pain for every 20 treated at two to three days, one in 16 at four to seven days, and one in seven by 10 to 12 days [s2]. Antibiotics also reduced eardrum perforations (RR 0.37, 95% CI 0.18 to 0.76) and halved infections spreading to the other ear (RR 0.49, 95% CI 0.25 to 0.95) [s2].

Against those benefits sit the harms and the null results. Adverse events such as vomiting, diarrhoea or rash were more common with antibiotics (RR 1.38, 95% CI 1.19 to 1.59) — roughly one extra child harmed for every 14 treated [s2]. Antibiotics did not reduce abnormal middle-ear findings at three months, nor later recurrences of infection, and severe complications were rare and no different between the groups [s2].

Who benefits most, and where waiting fits

The same review's analysis of individual patient data found the benefit was not uniform: antibiotics helped most in children younger than two with infection in both ears, and in children with ear discharge (otorrhoea) [s2]. That is the evidence base for a tiered approach rather than a blanket rule.

The American Academy of Pediatrics guideline builds exactly that. It reserves immediate antibiotics for the children most likely to benefit or to come to harm — the youngest infants, children with more severe illness such as marked ear pain or high fever, and younger children with infection in both ears — while offering an observation option, with a plan to start antibiotics if the child does not improve within a couple of days, for many older children with milder, one-sided disease [s1]. Crucially, the guideline pairs the observation option with shared decision-making and reliable follow-up, not with simply doing nothing [s1].

Why the restraint matters beyond the child

Acute otitis media is one of the most common reasons children are prescribed antibiotics, so the stakes extend past the individual. Every avoidable course adds to the selection pressure driving antibiotic resistance, the same logic that governs our coverage of antibiotics for colds. A treatment whose benefit is modest and whose harms are common is precisely the kind where withholding, or delaying, is defensible medicine rather than neglect.

How to read this without overreaching

The evidence supports a measured conclusion. Antibiotics shorten the pain of an ear infection for some children and prevent some perforations and spread, but they do nothing in the first day, most children recover without them, and they carry a real rate of side effects [s2]. The children who gain the most are the youngest, the sickest, and those with bilateral disease or discharge [s2], which is why guidelines target treatment rather than dispensing it automatically [s1].

The limits are worth stating. The trial evidence comes from high-income settings, where serious complications of ear infection are rare; the calculus can differ where follow-up is unreliable or complications more common. And "acute otitis media" must be diagnosed accurately in the first place — much of the antibiotic waste in practice comes from treating fluid in the ear that is not an acute infection at all [s1].

This article is informational and is not medical advice. It does not recommend any antibiotic, dose or treatment decision for an individual child, and any concern about a child's ear infection or fever should be discussed with a qualified clinician. Our explainer on treating a child's fever covers the related question of when a temperature needs treatment.