Im not trying to play doctor but where does it hurt? When did it start and how long has it been around?
You might need to tweak something. For instance, when I was training hard specifically for pull ups. After about a month and a half my neck started hurting. I was like
I was just working hard today, then after the rest and the next workout the pain came back and it kept coming back worse and worse. It got to the point where not only could I not so pull-ups or lat pull downs. Long story short I just tweaked my positioning and all the pain went away.
It happened again at tue beginning of toward the end of July. I was jumping rope everyday for an hour. My right lower calf started hurting. Again I was like
"I just got a good workout in" then of course the pain kept coming back. At first it would appear maybe 40 minutes in, then 20, then 15, then 10. Now at 25+ minutes I could push through my workout. When the pain came between 10 and 20 minutes I knew something was wrong and it was intolerable. My feet would go completely numb and my leg would leg below the knee was numb. You know if you wrap a rubber band around your finger or fall asleep on your arm? Imagine that on your lower leg.
Anyway I recorded myself jumping rope and my feet were flaring out. So when I jumped I purposely had to focus on turning my feet in which in turn made them face straight and the pain went away my leg stopped being numb. After a week or two of that pain started radiating up my knee into my femur. I started sweating, at first I was like "osteoporosis?" "Arthritis?" I was jumping in the gym and I noticed my feet were going too inward so I was jumping pigeon toed. Once again I focused on my posture and movement and all the pain went away.