i’ve noticed these little bumps (kind of look like pimples but aren’t pimples) that are recurring and are only ever singular near/on my butt cheeks or sometimes near my vagina. they last such a long time (few months) disappear then come back, some even scar. does anyone have an idea what this may be? i’ve been to the doctors about it before even they couldn’t pin point what it may be. THANK YOU