<s>[INST] Hi, I have a hard knot like bump that is under my skin( and not seen at all from just looking at my leg) it s under my in thigh. I have a smaller one on the other leg and is in the same area. I m 15 years old and have been at football practice for four weeks now. My leg hurts real bad when i pull it up or rotate it. It s hard for me to run. Could it be a hernia? Or just like a muscle cramp? Please help me as soon as possible!!! [/INST] Dear Sir/MadamI have gone through your query and read your symptoms.In my opinion, hernias are normally not hard, so the possibility is less, you need to see what it is coming from and for that you will need investigation, muscular tear, or any benign growth is a possibility, but growths are usually not symmetrical in occurrence.its essential to examine it to come to a conclusion.I hope that answers your query. If your want any more clarification, contact me back.Dr Narender Saini </s>