Likely diagnosis is Sever’s disease It is very common in active kids between age 8–12.
Next Steps
Reduce running/football for 2–3 weeks.
Ice over heel after play (10–15 min)
Use soft cushioned shoes
Calf & Achilles stretching daily
Paracetamol if needed
Health Tips
Consult an orthopaedic surgeon if pain is severe or no improvement in 3–4 weeks.