Menstruation may be a little dark due to cold, or endometrial inflammation, as well as mental stress, depression and other factors. It is recommended to use a hot water bag to apply hot compresses to the abdomen, or drink brown sugar water to improve the symptoms. During menstruation, it is recommended to pay attention to rest, avoid exertion and stay up late, pay attention to keep warm, avoid cold. Dietary attention to eat light, easy to digest, containing more vitamins, high nutritional food, avoid eating spicy stimulation and cold food. Be cheerful, keep a good mood, avoid anger and depression. Pay attention to appropriate participation in sports and cultural and physical activities, to avoid causing blood stagnation, stay in the uterus for too long, appearing black color. During menstruation, you also need to pay attention to the vulva cleanliness and hygiene, avoid causing inflammation.