Sebaceous hyperplasia is a common, benign condition of sebaceous glands. They may be single or in groups and are small yellowish, soft, bumps with a small depression /pore in the center from which a very small globule of sebum can sometimes be expressed.
At puberty, the sebaceous glands enlarge and become more active due to increased production of androgens, and they reach their maximum activity in your 30s. As androgen levels decrease with advancing age, the sebocyte (oil producing cell) turnover begins to slow down. This slowdown results in blockage of the sebaceous gland, causing it to enlarge forming sebaceous hyperplasia. Although the hyperplastic glands are often inflated up to 10 times their normal size, they secrete very little oil.
Sebaceous hyperplasia usually appears on the face, particularly nose, cheeks, and forehead. S occasionally they also occurs on the body.
It usually appears in adults of middle age or older, although people of any age and even babies may get them.
Sebaceous hyperplasia usually occurs on the face, particularly around hair follicles, but can be present anywhere on the body where you have oil producing glands.