Darkening of menstruation is not a sign of serious illness. The darkness of menstruation is considered to be related to the low volume of menstruation and poor discharge, if the volume of women’s menstruation is relatively low, and there is poor discharge, menstrual blood will be oxidized in the uterine cavity, so there will be the darkness of menstruation, so the darkness of menstruation is considered to be related to menstrual disorders, and it is recommended that we improve the irregularities of menstruation, and it is generally not related to the major diseases. The small amount of menstruation is considered to be related to mental stress and malnutrition, etc. In this case, it is recommended to strengthen the nutrition, pay more attention to rest, and actively adjust and release the pressure to avoid too much mental stress. Women should also pay attention to warmth during menstruation to avoid catching cold, pay attention to personal hygiene, change sanitary napkins during menstruation, and maintain a good mood. Menstruation darkening may also be caused by other reasons, it is recommended to go to the hospital as soon as possible, improve the examination to clarify the cause of the disease, timely treatment and treatment.