What is this on my arm??????

[Anonymous]

A few days a go I noticed that I had a bruise on my arm about the size of a nickel, sort of on my tricep. Not unusual. I frequently get bruises and have no idea how I got them. This one isn't going away and it's starting to indent. It isn't sore and doesn't feel weird or hurt or anything. Well, maybe it's getting a little sore because I keep pressing on it. But the indent seems to be getting deeper. Can't tell if it's a muscle or skin issue. WTH?

[Anonymous]

hematoma?