The normal skin color of the nose should be in harmony with the overall color of the face; some significant color changes are often pathological. A yellow or brown nose often indicates problems with the spleen and lungs. Ling Shu. It is written in the chapter “Five Colors”: “The five colors depend on Ming Tang, and Ming Tang is also the nose. Mingtang is located in the middle of the face and is the guideline for Chinese medicine diagnosis, so it is also called the king of the face. It concentrates the essence of the five organs, its root is the heart and lungs, the surrounding area is waiting for the six internal organs, and the lower part should be reproductive. Therefore, the color of Mingtang and its surroundings can reflect the changes in the essence of the five internal organs and forecast potential diseases. What can cause a yellow or brown nose? Diseases related to the spleen and lungs, mostly due to diseases of the digestive system. It concentrates the essence of the five viscera, whose root dominates the heart and lungs, the surrounding waits for the six internal organs, and the lower part should be reproductive. Therefore, the color of Ming Tang and its surroundings can reflect the changes in the essence of the five viscera and six internal organs and predict potential diseases. It is also important to note the possibility of liver disease, anemia, and other causes. as well as the possibility of other causes. The nose is slightly black for the internal stoppage of water, black and scorched, indicating excessive sexual intercourse, should know the restraint. For men, a black nose is a sign of abdominal pain, and a black nose is a sign of pain in the penis and testicles. For women, a black nose is often a sign of pain in the bladder and uterus. If the black color is attached to the middle of the human body, there may be leucorrhea and unclean menstruation. If the nostrils are dry and black like coal, it is deep Yang toxicity and heat, or dry heat knotted in the large intestine. A black nose with floating and bright light is a case of violent eating of unclean food. Dark brown spots on the skin of the nose, in addition to sun exposure, may also be pigmentation due to liver disease. If a patient with a long illness, the nose black as smoky, indicating a serious condition. A dark nose and a dull left and right nose are omens of a critical illness. The nose is white, commonly due to Qi deficiency, blood deficiency or blood loss, in children is spleen deficiency diarrhea, milk food does not dissolve; nose white main lung disease, such as cold phlegm, chronic bronchitis, etc.; nasal mucosa pale white main cold evidence, mucous membrane flushed main internal heat. The nose is blue, for gastrointestinal disease abdominal pain, to the cold side of the majority; children’s nose green and black, suggesting a more serious condition, or a cold severe pain. Red patches of skin on the bridge of the nose that appear above the entire skin surface and extend to both cheeks can be seen in systemic lupus erythematosus. If the reddened skin appears mainly on the tip of the nose and nasal wings, with capillary dilation and skin thickening, and the surface is uneven, it is mostly seen in rosacea, which is named because it is commonly seen in alcoholics. However, modern medical research shows that psychological factors, gastrointestinal dysfunction, endocrine disorders and other factors are related to it. In addition, the appearance of red nose also has a certain relationship with liver disease or heart disease.