The most common reason for frequent colds is that the patient’s resistance has dropped or there are underlying diseases. The treatment methods are adjusting living habits, improving immunity and treating underlying diseases. 1. Adjustment of living habits: People who frequently catch colds should maintain a healthy diet, eat more vitamin-rich vegetables and fruits and protein-rich meat. They should keep a regular routine, not stay up late, and avoid fatigue. Adequate nutrition and a good state of mind can prevent the invasion of the virus. 2. Improve immunity: Exercise every day to strengthen your body, or get vaccinated against influenza virus in advance every year to improve your immunity and prevent the occurrence of colds. 3. Treatment of underlying diseases: people who often catch colds may have underlying diseases such as AIDS, diabetes, chronic heart disease and other causes of poor body resistance, which requires patients to go to the hospital to find out the cause of the disease, under the guidance of the doctor to treat the underlying diseases.