I have a lump under my skin and it feels like its attached to a muscle. I can move my wrist normally when its down by my side but if I raise my arm and try to bend my wrist its a sharp pain that goes through my arm. The bump was smaller and felt like it moved but now its bigger and doesn t move as much. It happened when me and my brother was rough housing. There was a big bruise there before I felt the bumps. Should I have it looked at?