Hello,
I cannot confirm anything without examination but it can be a cyst, keratoacanthoma or a spider angioma. A spider angioma is a grouping of small blood vessels at the skin surface. The pattern sometimes resembles the threads of a spider's web.
I suggest you to get it evaluated from a dermatologist as treatment is specific diagnosis.
It is very difficult to precisely confirm a diagnosis without examination and investigations and the answer is based on the medical information provided. For exact diagnosis, you are requested to consult your doctor. I sincerely hope that helps. Take care and please do keep me posted on how you are doing.
You've never seen a dermatologist in all the time you've had about this?
Rosacea is the term used to describe face bumps (acne past adolescence) and redness. Used to be called acne-rosacea. If that is what you have, there are topical solutions and medications available.
Tetracycline is most effective antibiotic for condition.
With just one bump, it could be most anything. Just wanted you to know about a common condition that causes face (and scalp) bumps.