Hi and thanks for using the forum.
I never suggest that you pop these types of things. YOu can do way more harm then good- leaving yourself open for infection and the possiblity of scarring. You should see a dermatologist with this. I am not sure what it is- it does not look like eczema from the picture. It is possible that it is a cold sore, but I cannot be sure. In the meantime, treat it like it is contagious and be sure to wash your hands frequently to prevent spreading it. Good luck.
Bridget
have you test for herpes 1 or 2...or HIV.. I suggest you get it done before anything eles