Hi, I'm female 22 yrs old, and I found a lump on my left calf, near where the fibula bone is. I'm very active person, and having a routine activities for competition(Chinese martial arts). I wonder if the lump caused by those exercises?It's painless, but started from yesterday after I squeezed it, it's getting painful(come and go), but it's more like a pinched nerve from the lump area to my foot. Could you tell me if this case is a serious problem/not? Thank you