Non itchy red bumps under buttocks?

Biopsy. See a dermatologist for a possible biopsy. This does need to be evaluated.

Related Questions

Itchy red bumps around thighs and buttocks?

Difficult to say. It's often difficult to diagnose skin issues without seeing them in person. I recommend seeing your doctor for diagnosis and any needed treatment. Read more...

I have non itchy red bumps all over my torso, in my armpits, etc. Sporadic, 19 total. Doesn't seem to be a bug bite, no pus, husband doesn't have any?

Pityriasis Rosea? Do you recall where the rash started? Pityriasis Rosea is characterized by a symmetrical rash that usually begins with a "herald patch." The herald patch is an oval, fawn-colored patch that precedes the generalized eruption. Google images for Pityriasis Rosea--see if that's what you look like. The cause is unknown, and requires no treatment. Should resolve in a few months. Not infectious. Read more...