A female running colleague has developed a severe pain to the back of her right thigh when running. I thought that it could be a hamstring injury. Sometimes it eases on gentle slow runs then returns again at any given time during running. What would you advise her to do.I have suggested keeping the muscle warm when running via either cycling type shorts under her long running pants,heat generating cream on thigh when running ie gel etc. She finds it very difficult when I tel her to rest it.