Hi. I have three bumps on my left forearm , a few inches below the elbow. They seem to have formed in a line, the smallest being closest to the elbow and the largest being about a third of the way down my forearm. They seem to raise like small hills. The bumps also only appear when I bend my elbow or flex my forearm. They aren t (and never have been) red, itchy, or at all painful. They don t seem to be above a vein, and they don t move (if I move the skin around them, they seem to be under the skin). If I press on them they just go flat and raise up again when I release, if I squeeze them they just seem to move into the skin. I m thinking they re on the muscle? Or perhaps part of the skin (though it s weird that they don t move)? I wouldn t know... I ve had them for quite some time, at least three years and probably more. I m just curious as to what they might be and if they re anything to worry about? I don t think they came about as a result of any sort of injury, or at least it s nothing that I can remember and there doesn t seem to be any scarring.