Ok buddy, this is a STD forum, we deal with STD's so that is the approach in this forum. You asked if it was a STD and I gave you that answer. We are not Dr's, we don't look at pictures. Even a Dr can't tell you what something is online.
I found what it is. It's a blister. My dermatologist said that It looked like a blister caused by a burn. I did burn myself a little bit with the heat of my laptop. It hut a little but I forgot about it almost immediately.
Vance2335 your response was useless. Please refrain yourself from answering questions when you don't have anything important to share.
STD's have that name for a reason can only get from sex.