Whether a respiratory tract infection can heal itself depends mainly on the patient’s resistance and the severity of the disease. For milder upper respiratory tract infections, the patient’s symptoms are not obvious, and self-healing can be achieved through the patient’s own mechanisms. Patients with symptoms similar to those of upper respiratory tract infections can gradually heal themselves by resting, drinking more water, and eating more fresh vegetables and fruits so that clinical symptoms are slowed down and the infection gradually heals itself. However, lower respiratory tract infections are often bacterial infections, which are less likely to heal on their own, with high blood levels, wet rales in the lungs, and foci of infection in the lungs as indicated by chest X-ray or CT. In respiratory tract infection, you can drink more water, pay attention to rest, and take more vitamin C supplements to help your body recover. During the treatment period, the diet should be light, with less spicy and stimulating oily food, and avoid seafood food. Also pay attention to weather changes, prevent cold and keep warm. Pay attention to ventilate the room to be able to reduce the mutual infection.