The skin around the corners of the mouth is particularly bad, and it is always dark. This is because these parts of the corners of the mouth are fragile and easy to precipitate melanin, which requires more attention and protection. The production of melanin is mostly related to endocrine disorders and sunlight exposure. The number of melanocytes mainly depends on heredity, in addition, it is also related to endocrine hormones and nutritional status. Poor sleep can also lead to blackening around the corners of the mouth. Sleep does not lead to insufficient blood support, resulting in blackening of the corners of the mouth. It is recommended to go to bed early and get up early, and eat some foods such as red dates, longan, spinach and auricularia. It will take a while to recuperate. If you have one or several black spots on your lips, you should go to the stomatology or dermatology department of the hospital to rule out the possibility of pigmented diseases or vascular diseases, such as pigmented nevus or hemangioma, and make relevant examinations if necessary. If the overall color is dim and black, pay attention to whether there is a problem with the digestive system. If there is a circle of black around the lips, it may be related to dampness or spleen and kidney deficiency in the body. Black around the lips, pay attention to wipe it with a soft paper towel or handkerchief after daily diet, and moisturize it with moisturizing products. In winter and autumn, the dry climate, the accelerated evaporation of water from the lip mucosa, or bad habits such as licking and biting the lips, or improper handling after trauma can all cause excessive and rapid local water loss, resulting in dry lips and cracks, and even serious infection and recurrent chronic inflammation. Carrots are sweet and mild in taste, and are rich in carotene, which can be converted into vitamin A in the body. Vitamin A can moisten and nourish epithelial cells and prevent dry skin, hair falling easily and dry eye. Therefore, while maintaining oral hygiene and overcoming bad habits, you can eat some foods, vegetables and fruits of carotene and vitamin B family. The symptoms of chapped lips can be improved.