What is This on my Hand? (photo)

Before I was a dermatologist, I thought I could learn dermatology form a picture book. That really is not the case. It sounds like the bump has been there for quite some time. It most likely is a benign process. It certainly could be a callous, just like a writer's bump on the finger from holding the pen improperly. There are other dermatologic conditions, one is call granuloma annulare, that usually appears on the hands. Usually they are circular are... more