Adults who always catch colds are usually due to exposure to high-risk groups and lowered self-resistance. 1. The likelihood of infection increases when patients are in frequent contact with high-risk groups, especially those with colds. Colds are easily transmitted through the airborne transmission of patients’ sneezes and droplets containing viruses, or through the contact transmission of contaminated hands and utensils, so if the probability of contact is high, the probability of infection will be easily increased. 2. Due to the decline of their own resistance, such as the elderly, people with underlying diseases, these people have poorer body resistance, easy to catch a cold. If adults always have colds, they should strengthen exercise, drink more water, exercise more, keep reasonable sleep, enhance nutrition, and eat more fruits and vegetables. At the same time to pay attention to their own immunity has no problem, it is recommended to promptly consult a doctor, follow the doctor’s instructions for further examination, in the doctor’s help for targeted treatment or treatment.