Why does the nose grow blackhead

The nose shows blackheads, also known as blackheads. It belongs to an open acne, which is the direct exposure of the sebum surface that blocks the pores to the outside, contact with the air and dust, and oxidation of the sebaceous glands in the air, resulting in blackening. Blackheads are more common in adolescents, good hair on the face, chest and back, especially on the nose. A plug-like substance mainly composed of sebum, cell dust and bacteria, blocking the hair follicle opening. Show blackheads, pay attention to local skin hygiene. The above health science knowledge is for reference only, the specific situation needs to be checked in a regular hospital, judged by a professional doctor.