It is normal for a patient to experience a cold and fever that has not been present for several years. Patients are prone to catching viruses or bacteria when their immune system is relatively low, resulting in a cold and fever. If a patient does not have a cold or fever for a long time, it proves that the patient has a high immune system and a strong ability to fight diseases. In daily life, patients should pay attention to strengthen their immune function, which can avoid the symptoms of cold and fever. Diet needs to be balanced and nutritious, meat and vegetables, not picky and partial food. Do appropriate exercise, more aerobic exercise, such as walking, jogging, swimming, etc., but not excessive activity, otherwise it will reduce the body’s immune function. You should keep a good resting habit, go to bed on time, and not stay up late for a long time.