

Is this a hematoma lump? Feels hard and came after blood work from that arm
—I’m pulling my skin back to show the ball-like lump there. I have no clue what this is, never had it before.
I noticed it day 2 after I had blood work in that arm, it’s now been a little over a week and hasn’t decreased in size. It feels like a hard, ball almost like a bone.
My elbow is sensitive all over and feels slightly raw inside, but there’s no wounds on it from outside. I had blood work done on the inner crease of my arm, so it’s odd it would show up on the outer part of my elbow. It’s still mobile in all directions, but feels pretty tender in the elbow, crease and outer bone (which lately feels like my bone is sticking out more on that arm now compared to my other normal arm). Could this be a hematoma lump? What should I do to treat it?