blister in foreskin

I have what looks like a blister in my foreskin (color: purple). It is located on the edge between inside and outside of my foreskin.

I have the following options:
-wait until it goes away (if it ever does, it's been there for at least 3 weeks already)
-pop it with a needle
-go to the doctor (I hae a small penis so I'd rather not)

WHAT SHOULD I DO

You should have been circumsized like the rest of the the civilized world. Enjoy your smegma.