Question: Hi, two days ago I noticed a small (maybe 1cm wide?) single clear fluid blister on my penile shaft when I went to the bathroom. I was curious so I gently rubbed my finger over it and it opened up and a small amount of clear fluid came out....i barely had to press on it at all. There were no other blisters present, it did not hurt at all, no blood or pus, and no redness around the blister either. I cleaned it up and immediately went to pharmacy to buy antibiotic cream and blister band aids to cover the area. Later that night when I showered, there was no pain unless I stretched the skin around it. I've been covering the area and applying antibiotic cream for past two days and it looks like the area is healing slowly...I'd hate to have a scar haha. I will attach picture of what the area looks like after two days of treating with antibacterial ointment and covering with blister bandaid. I had sex, oral and vaginal intercourse about a week ago and used a condom (except for oral), but I masturbate frequently as well. Could friction or trauma to the penis due to masturbation cause a single, painless, small, fluid filled blister? Or should I get tested for an STD sooner than later...? I have no other symptoms of herpes or any other STD, and am in good health. I was thinking it could've been an ingrown hair because i had shaved several days prior, and my hair grows pretty thick so i usually get ingrown hairs, but typically those look more like pimples and have some pain associated...this one didn't.

Thank you so much for the quick response! I'm assuming you would you suggest waiting for it to fully heal until beginning sexual activity or masturbation again?