Blackheads, also known as blackheads, are open comedones (the surface layer of sebum that blocks pores is directly exposed to the outside and comes into contact with air and dust in the air).

Blackheads are common in teenagers during puberty and development, and are common on the face, chest and back. They are characterized by black spots in obviously enlarged pores, which look like small worms after extrusion, with hair at the top. black.

Extended information

The main cause of blackheads is mites:

Mites are parasitic in places that are easily accessible, the temperature and humidity are more suitable for their growth and reproduction, and the sebaceous glands are relatively Rich places, such as: nose, forehead, face. When the infection first reaches the face, a few people will feel a slight itching sensation in their nose and face when they sweat or when sleeping at night. After a period of time, blackheads will appear (which are secretions excreted by mites that clog pores and are caused by drying and hardening). As the pores slowly begin to enlarge, the skin begins to change from neutral to mixed, and then to oily. If not treated promptly and effectively at this time, it will cause skin inflammation. This is what we call "blackheads." , pimples, acne, rosacea".

Reference source Baidu Encyclopedia, blackheads