Colds are caused by different types of viral and bacterial infections in the human body, resulting in some milder and some more severe conditions, and the corresponding clinical symptoms will also vary. Common cold is caused by viral infection, commonly known as ‘cold and flu’. The onset of the disease is relatively rapid, the main manifestations are: runny nose, sneezing, nasal congestion, and postnasal drip, with or without fever, tearing, patients with irritation in the throat, such as sore throat, obvious when swallowing, but the chest physical examination is normal. Immunocompromised patients sometimes have inflammation of the Eustachian tube resulting in hearing loss. In severe cases, there are fever, mild chills and headache, etc. Once the fever is the manifestation of inflammation, the patient should go to the hospital for examination, and should not treat it as a small cold and just take some medicine. Under normal circumstances 5-7 days to heal, if the patient has complications will make the course of the disease time prolonged. Influenza referred to as influenza, incubation period of 1-3 days, the onset of acute, patients with high fever, headache, fatigue, generalized muscle aches and pains and other symptoms of intoxication obvious. As the antigenicity (a substance that attacks the human body) of the influenza virus changes rapidly, the body is unable to acquire lasting immunity. The best way to deal with colds on a daily basis is to exercise diligently and develop good hygiene habits. Once you have a cold, you should drink plenty of hot water at this time.