I have had this problem for years, with no known reason why/how it began. What happens is I'll first feel a bump or two on my face or neck. They're under-the-skin, non-itchy, painless, skin-colored bumps that swell when I touch (or, guilty, pick!) them and also begin to spread to a cluster. I don't think they're pimples - from what I know, cysts are painful and movable, which these are neither of. They also never come to the surface and I don't think they're puss filled. If I stop touching them, they'll de-swell after awhile, but small bumps will remain for a day or two.
A bit of a background, I have keratosis pilaris on my upper arms and I know that it can occur on the face as well, but these are not the same kind of bumps whatsoever. Other than that, I have pretty normal skin, with the occasion pimple showing up but never severe acne of any sort. I also don't think it's an allergy of any sort, since it has been happening for several years and I've changed face products and whatnot over that time. The only medication I'm on is birth control, but again, they started before I went on it.
I've tried searching for an answer online, but haven't had any luck yet. Though I'm sure they're not harmful, they are annoying and unattractive when they swell up, so I'm hoping someone will have an idea as to what's wrong!
Thanks!!