What Causes Pain And Lump In The Leg After Running?

My daughter is a 17 yr old softball playr and twice a week they do conditioning . They have to run for a mile to get their times downa dn on Tuesday she was runnning and her calves were burning and a hugh lump appeared on the outsde of her leg. The trainor immediated stopped her and applied ice and said she really has never seen a muscle like this and to stay off of this for a week. If she continues in pain go to the emergency room. She went to her Chiropractic doctor and he said she had what they call a circulatory problem where the blood flow stays in a chamber and this startes acirculatory problem. He told her to be careful about running for any distance and if this recurs again it could be very dangerous. Sometime s if the circulation does not come back and her toes and feet become numb they may have to slice the leg open to get the blood flow again. What condiion is this and what doctor should we see? Can she continue to play ball? She is an outstanding pitcher and she is going to several college showcases in January. He said the short base running may not be a problem.