What actually helps plantar fasciitis? Load, stretching and patience beat the needle

Plantar fasciitis is the classic sharp pain under the heel that is worst with the first steps out of bed. The honest headline is that most of it gets better on its own, that the cheap first-line measures have the best safety record, and that the more invasive options buy less than their reputation suggests. Nothing here works dramatically, and the treatment with the loudest reputation — the steroid injection — has the shortest-lived benefit.

What the injection actually does

The most rigorously synthesised question is the steroid shot. A Cochrane review pooled 39 studies (36 randomised controlled trials and three quasi-randomised trials) involving a total of 2492 adults [s1]. Against placebo or no treatment, a steroid injection may lower heel pain on a 0-to-100 visual analogue scale in the short term, under one month, by a mean difference of 6.38 points (95% confidence interval 11.13 to 1.64) [s1]. Set against the minimal clinically significant difference of 8 points the review used, that estimate sits just below the threshold for a difference a patient would notice, and the benefit shrank further when the analysis was restricted to placebo-controlled trials [s1].

By the medium term — one to six months — the effect was gone: a mean difference of 3.47 points (95% CI 8.43 to a worse 1.48), which is no difference at all [s1]. The review rated most of its evidence as very low quality, meaning it is very uncertain about the estimates [s1]. Most of the 39 trials were small, with a median of 59 participants, and nearly all were judged at high risk of bias, mostly from a lack of blinding [s1]. Harms are rare but real: pooling 21 trials that reported adverse events turned up two ruptures of the plantar fascia and three injection-site infections among 699 people given steroid [s1]. So the injection is a way to feel better for a few weeks, not a cure.

Stretching, load and footwear

The unglamorous measures are the ones the guideline actually leads with. The American Physical Therapy Association's revised 2023 clinical practice guideline for heel pain reviews the current literature and issues graded recommendations for nonarthritic heel pain [s2]. Its consistent message across editions has been to prioritise stretching of the calf and the plantar fascia, manual therapy, taping and supportive footwear or orthoses before anything invasive [s2].

Orthoses are worth their own look because they are so heavily sold. A Cochrane review of custom-made foot orthoses found five trials covering 691 participants specifically for plantar fasciitis, and concluded it was unclear whether custom-made orthoses were effective for the condition, rating the evidence for plantar fasciitis at "silver" level [s3]. Custom devices were a safe intervention in every included study [s3]. In plain terms: a supportive insole is low-risk and may help, but there is no good case for paying for an expensive moulded one over a prefabricated one.

Shockwave for the stubborn cases

When months pass and the basics have not worked, extracorporeal shock wave therapy (ESWT) is the next step with a genuine evidence base. A 2024 systematic review with meta-analysis of 11 studies found ESWT effective at reducing pain on the visual analogue scale, with a pooled reduction of 2.818 points for focal ESWT and 3.038 points for radial ESWT [s4]. Those are modest average effects, and the review's central caveat is that the specific machine parameters — frequency, number of pulses, energy flux density — both drive the pain relief and drive dropouts, so results depend heavily on how the treatment is delivered [s4].

The honest position

Plantar fasciitis is a self-limiting condition dressed up as an emergency. The safest, cheapest measures — reducing the load that provokes it, stretching the calf and fascia, and a supportive shoe or off-the-shelf insole — are also the ones guidelines put first, precisely because the downside is close to zero [s2][s3]. A steroid injection can break a bad patch, but its benefit is measured in weeks and it carries a small risk of doing harm to the very tissue it targets [s1]. Shockwave is a reasonable option for pain that has dug in for months, with the understanding that the average benefit is moderate [s4]. The thing that resolves most cases is not on any of these lists: time.

This article is informational and is not medical advice.

Sources

• [s1] Injected corticosteroids for treating plantar heel pain in adults — Cochrane Database of Systematic Reviews, 11 June 2017. https://doi.org/10.1002/14651858.CD009348.pub2
• [s2] Heel Pain – Plantar Fasciitis: Revision 2023 — Journal of Orthopaedic & Sports Physical Therapy, 1 December 2023. https://doi.org/10.2519/jospt.2023.0303
• [s3] Custom-made foot orthoses for the treatment of foot pain — Cochrane Database of Systematic Reviews, 16 July 2008. https://doi.org/10.1002/14651858.CD006801.pub2
• [s4] Efficacy and tolerability of extracorporeal shock wave therapy in patients with plantar fasciopathy — European Journal of Physical and Rehabilitation Medicine, 11 September 2024. https://doi.org/10.23736/s1973-9087.24.08136-x