What's this?

[DriftGames]

I've had this hard bump next to my knee for about 4 years now. It hasn't changed in size, it doesn't hurt, it doesn't move. It's just a hard lump. Anyone know what it could be? Excuse the fact I clearly don't dare shave too close to it

I’ve had a few dermatofibromas on my legs and they look like that.

Yes, dermatofibroma.

Are they harmless & did you have them removed or?