an std is really unlikely here. it probably has more to do with chafing heat the clothes you wear or the soaps you use. try a little body powder to reduce the chafing or maybe try different clothes if you can get a break to do that in and put a little acne wash on there in the shower to clear up the bumps.
rash on lower back. h i've had a rash on my lower back for a few months now that will not go away it's on the top of my buttocks to be precise. it's somewhat itchy whenever i'm sweating/working out but doesn't cause pain i'm worried it may be an std but i haven't had any type of sexual intercourse since august 2015. any help is well appreciated thank you!