Ive never seen them before, till pain as started

I don't have any pain at all and never even thought about then been a problem. I just thought they were from bumps and falls as a child x

Does anyone gey pain from these dents? X

I have one on my side.

I have a BIG dent in my right arm between my elbow and wrist. It looks like someone grabbed my arm, and the dent didn't fill back in. It's been on my arm since I was diagnosed with fibro, come to think of it. There's no pain involved, it just looks funny.