Small black hairs in the pores of the face are mostly caused by exuberant secretion of sebaceous glands or excessive secretion of androgens, and it is recommended to treat the causes. 1. Excessive sebaceous gland secretion: if you often stay up late or work under pressure, it will cause the skin to secrete more oil, which oxidizes and turns black, leading to the appearance of small black hairs in the pores. 2. Androgen secretion: most of the small black hairs in the pores of the face are caused by the exuberant secretion of androgens, it is recommended to keep the skin clean and clean to avoid the face of long black hairs. There may be other reasons for the small black hairs in the pores of the face, it is recommended to go to the hospital in time, under the guidance of the doctor to standardize the treatment.