Sebaceous glands grow larger as the body grows, and also trauma, sun exposure, and medication can cause sebaceous nevi to grow larger.
Sebaceous nevus is a kind of benign tumor of the skin, preferably on the head and face, especially on the head, and most of them appear from infancy, and the cause is unknown at present.
After birth, the nevus of sebaceous gland grows in size as the skin grows and the sebaceous glands mature. After adulthood, the nevus usually stops growing, but it may become larger when exposed to external stimuli such as sunlight, trauma, infection, etc., and may be accompanied by different degrees of pain or itching. In old age, the nevus will gradually turn black and harden, forming hard wart-like growths.
Sebaceous nevus patients usually need to pay attention to the scalp to avoid exposure to the sun, if necessary to play umbrellas or avoid going out, can not scratch the local skin.
Patients with sebaceous nevus are advised to treat it as soon as possible. Smaller sebaceous nevus can be treated with laser, high-frequency electrocautery or freezing, while larger ones need to be treated with surgery.