What is Sever's disease?
Sever's disease, properly called calcaneal apophysitis, is irritation of the growth plate at the back of the heel bone. The Achilles tendon attaches directly onto that growth plate, and the plantar fascia pulls on the underside of the same bone. During growth the heel bone lengthens before the calf muscle and Achilles adapt, so the tissue gets squeezed from both directions at exactly the point where it is least able to cope.
Add hard surfaces, studded boots with minimal cushioning and a busy fixture list, and you have the classic picture: a young footballer, netballer, gymnast or runner limping off after a session and walking on tiptoes in the morning.
The symptoms parents notice first
- Limping or tiptoe walking, especially after sport and first thing in the morning.
- Pain at the back and sides of the heel, rather than under the arch.
- Squeezing the heel from both sides reproduces the pain, the 'squeeze test'.
- Pain rises during a session and eases within a day or two of rest.
- It is often bilateral, affecting both heels either together or in turn.
What treatment actually works
The single biggest lever is load, not treatment. Cutting the highest-impact volume - sprinting, jumping, running on hard surfaces, by roughly half is usually enough to bring symptoms down within a fortnight while keeping your child in sport.
Alongside that, calf strength is the priority. A stronger, more tolerant calf-Achilles unit reduces the pull on the heel growth plate. Start with double-leg calf raises and isometric holds, progress to single-leg work through the full range, and add speed and hopping only when the heel is comfortable with the slow, heavy work.
- Heel raises or cushioned inserts to reduce the tension and impact at the heel.
- Well-cushioned trainers for training; limit time in studded boots and firm-ground footwear.
- Calf flexibility work, which is commonly restricted during a growth spurt.
- Ice after games for symptom relief - helpful for comfort, not a treatment in itself.
- A graded return to running and jumping once the squeeze test is no longer painful.
What does not help
- Complete rest for weeks on end, pain settles and then returns as soon as sport resumes.
- Stretching alone, without any strengthening.
- Waiting for it to 'grow out' while continuing full training volume.
- Anti-inflammatory medication used to mask pain so training can continue unchanged.
How long does it last?
With structured management, most young athletes are substantially better within 6–8 weeks and back to full training within that period. Symptoms can recur during subsequent growth phases or when training volume jumps, which is why keeping the calf strength work going after the pain has gone matters.
Sever's disease resolves permanently once the heel growth plate fuses, typically around 14–15 years of age. It causes no long-term damage.
When to worry
- Pain at rest or at night, rather than only with activity.
- Swelling, redness or warmth around the heel.
- Heel pain in a child under 7 or over 15, where Sever's is much less likely.
- Pain following a specific fall or landing, which may indicate a fracture.
- Symptoms that have not improved at all after six to eight weeks of good management.
- Fever, unexplained weight loss, or the child feeling generally unwell.