Grey cheeks are a reflection of a physical disease problem. Chinese medicine considers the dark cheeks as a manifestation of kidney deficiency, so it is often treated with kidney tonics. In addition, patients with hepatic sclerosis, hyperalgesia, chronic renal insufficiency, chronic cardiopulmonary insufficiency and hepatocellular carcinoma may also experience darkening of the cheeks. As for the darkening of cheeks due to physiological phenomena, age-related pigmentation spots and women’s pregnancy spots, etc., they are normal phenomena and not diseases. So, how to diagnose gray cheeks? The following are the differential diagnosis methods for gray cheeks: 1. Yellowish color: yellowish color describes the appearance of a person who is malnourished or sick. Clinically, there are many causes of yellowing cheeks, among which there are pathological and non-pathological ones, which should be carefully discerned. 2.Grey cheeks: It indicates a lack of oxygen in the body and poor lung function. You should go for walks and jogging in the park more often. And supplement green vegetables and increase the intake of protein, minerals and crude fiber. 3, the face is dark: Chinese medicine believes that the face is dark is a manifestation of kidney deficiency, so commonly used to treat kidney drugs. In addition, patients with hepatic sclerosis, hyperalgesia, chronic renal insufficiency, chronic cardiopulmonary insufficiency, liver cancer, etc., may also have a dark face. As for the darkening of the face due to physiological phenomena, age-related pigmentation spots and women’s pregnancy spots, they are normal phenomena and not diseases.