My 10 year old son plays basketball and he is getting really sore after playing games. He keeps pointing to his heels and even limps sometimes. What is it? He didn't start the game limping. The Most Common Cause of Heel Pain in kids is.... Sever’s Disease (also known medically as calcaneal apophysitis) Sever’s disease occurs at the ankle and is the most common cause of heel pain in children age 5-11. This disease was named after Dr. James Warren Sever who first described the