Cold more than 20 days face and leg wasting, may be related to colds, tuberculosis, diabetes, malignant tumors and so on. 1. Generally there will not be a cold for more than 20 days does not heal the situation, but do not rule out special circumstances, and the cold due to fever and other reasons, can lead to faster metabolism, and cold during the digestive function is usually weakened, loss of appetite, may cause wasting performance. 2. Tuberculosis: It is also a typical disease that can cause wasting, accompanied by low fever, cough and other symptoms, which can be mistaken for a cold. 3. Diabetes mellitus: weight loss is a typical symptom, accompanied by eating too much, drinking too much and urinating too much. 4. Malignant tumor: due to the chronic consumption of energy by the tumor, emaciation can also occur. Therefore, wasting for more than 20 days is not necessarily a cold, it may suggest a combination of other diseases, it is recommended to consult a doctor in time to clarify the cause of the disease.