I have a small purplish spot on my upper arm, it's been there for a while and hasn't growen, I've been watching it. The spot ressembles a round blood blister , flat and very small. When I press on it , it loses color, like the blood goes out of it. Nurse at health clinic noticed it when I got my flu shot , and said it should be checked, Any ideas?

this could be as simple as a hemanginoma. get it checked out better safe than sorry. it could indicate a liver issue