Hello, I have a small lump under the skin on my right bicep. It is only noticeable by touch and it will move around under the skin. It has been there for about two weeks. When I first noticed it, I had a bruise at that spot on my bicep. I did not think anything of the bruise because basketball practice had just started so I figured it was the result of an elbow or something along those lines. The bruise has disappeared but the lump is still there under the skin. What might this link be and is it anything for concern. Thank you for your help.