Cold is a self-healing disease, usually cured in 5-10 days if the patient has strong resistance or good health, and can be prolonged if accompanied by complications. Colds are mainly caused by viral infections, such as rhinovirus, adenovirus, influenza virus and parainfluenza virus. Colds are mainly characterized by nasal symptoms such as nasal congestion, sneezing, and runny nose, as well as pharyngeal symptoms such as dryness, itchiness, soreness, cough, and phlegm. Colds are usually treated symptomatically, as there is no effective antiviral medication, so you can drink plenty of lukewarm water, pay attention to rest, quit smoking, keep indoor air circulation, eat a light diet, avoid spicy and stimulating foods, and can usually be cured through this treatment.