Pimple or STD
About 1 1/2 weeks ago I noticed a pimple like thing on the undershaft of my penis. I went to the doctor to get checked out and he said it could just be from the heat. We did the "vinegar test" to make sure it wasn't a wart (even though he was already convinced it wasn't) and came up clean. However, it doesn't seem to be going away or changing. Some days it is red and some days it looks like a whitehead. It is just one bump, not a cluster of bumps. I'm wondering if there is anything I can put on it or do you think it isn't going away because of the heat and humidity down there (it is on the undershaft so it basically right on my scrotum all day with no ventilation)
Please respond as I want to continue with my sex life!