The cold has been recurring and is related to overwork, sudden changes in climate and insufficient nutritional intake. 1. Excessive exertion: If a cold patient is overworked during the period of illness, it will lead to a decline in the body’s immunity, which will lead to the phenomenon of the disease recurring and not getting well. 2. Sudden changes in the climate: during a cold, you need to rest in bed and reduce the number of activities, if the patient goes out when the climate changes suddenly, cold, will lead to a decrease in the respiratory defense function, which will also lead to the disease back and forth not good. 3. Insufficient nutritional intake: during the cold, patients may have a loss of appetite or indigestion, which may lead to insufficient nutritional intake, affecting the recovery speed of the disease, and may also cause the disease to be recurrent. You should also pay attention to identify other cold symptoms, such as allergic rhinitis and nasopharyngeal carcinoma. During the cold period, you need to pay more attention to rest, reduce the number of times you go out, once you go out, you should also do a good job of keeping warm, and eat a diet rich in vitamins and proteins to strengthen the immune system. When the disease is prolonged, you should also cooperate with the doctor for examination and treatment to speed up the recovery of the disease.