Arteriovenous malformation or just excess blood on top lip - How to find a doctor? (photo)

As a child, I had two surgeries removing blood that was in the middle of the lip. However, it came back and now (34 years old), I want to remove it for good. I believe this occurred from trauma to the lip as an infant, but am not sure. I also do not know which doctor to see for this and I'm not sure if it is an Arteriovenous malformation or just excess blood.