TCM believes that the internal organs and tissues of the human body are connected and they are a complete whole. The lungs mainly control hair, and can affect skin. Here skin refers to the sweat glands in the skin, hair is on the skin. If lungs function well, they can disperse the nutrition that the body has absorbed to the surface of the body. So that the hair and skin can be nourished and become smooth. But if lungs can not function well, the nutrition can not get to the surface of the body. The skin and hair are dry, and when it get serious, hair may fall off. The skin and hair are related to lungs in this way. How are lungs and nose related? Lungs are connected with the outside through the nose, so lungs and nose belong to one system.