Viral cold can't be spicy and greasy. During the cold period, no matter whether it is cold or wind-heat, you should avoid all nourishing, greasy and sour foods, such as pork, duck, chicken, mutton gizzard, glutinous rice, astragalus, Polygonatum sibiricum, Ophiopogon japonicus, ginseng, placenta, donkey-hide gelatin, various marine fish, shrimp, crab, longan, pomegranate, dark plum and various sticky sweets.

Viral cold is a common disease, including common cold, influenza and viral pharyngitis, which is mainly transmitted through the nasal cavity through air or hand contact. Influenza is an acute respiratory infectious disease caused by influenza virus, which exists in the respiratory tract of patients and is spread by droplets when patients cough and sneeze. Because of its strong infectivity, difficult transmission route, fast transmission speed, wide transmission range, difficult control and great harm, it even causes serious cases (severe pneumonia, respiratory failure, etc. The common cold is caused by rhinovirus, coronavirus and parainfluenza virus. The common cold is much less contagious than the flu and often occurs alone. When the body's resistance drops, it is easy to get sick.