The black black like a beard may be caused by poor cleaning, pigmentation and androgen secretion. 1. poor cleaning: black and black like a beard, may be the local cleaning is not good, staining the black material. 2. Pigmentation spots: due to heredity, sun exposure and other reasons lead to the deposition of local melanocytes, pigmentation spots, in the form of dots or flakes. 3. Excessive androgen secretion: Due to the relatively high level of estrogen in women, the growth of beard is inhibited. When the estrogen level is lowered, androgen secretion will have some of the fuzz, which will lead to the appearance of the phenomenon of black like a beard in the middle of the man. When the patient appeared in the black like beard phenomenon, it is recommended to go to the regular hospital dermatology examination in a timely manner, such as pathologic factors caused by the treatment should be timely to comply with the doctor’s instructions.