I am not sure where to put this but today Danny (age 6) had field day at school. there was alot of running/playing etc. and of course he wanted to do it all. even though his aide myself and his teacher told him it was ok to sit one out/ he was not having it. antway about 3/4 of the way through his right calf became hard like a softball. we massaged and carried him to the next station and he participated but you could tell it hurt. the school nurse put ice on it and I continued to massage when he sat down. still now though 5 hours after last activity it is still very tight. any one ever have this with their son and any suggestions????