Cold, also known as typhoid and wind, is a common external illness caused by the wind attacking the human body. Clinical manifestations include nasal congestion, cough, headache, chills and fever, and general malaise. It can occur throughout the year, especially in spring. Due to the difference in the evil and the strength of the body, the symptoms can be expressed as wind-cold and wind-heat, and there are concurrent evidence of humidity and summer heat, as well as the difference in body deficiency cold. If the disease is heavy and widespread in a period of time, it is called “seasonal cold”. Western medicine’s upper respiratory tract infection belongs to the Chinese medicine’s cold category. Western medicine believes that when the human body is cold, rain, excessive fatigue and other triggering factors, so that the whole body or the respiratory tract local defense function is reduced, then the original existing in the respiratory tract or from outside the invasion of viruses, bacteria can quickly multiply, causing the disease to nasopharyngeal inflammation as the main performance. The main cause of the common cold is rhinovirus. Influenza is caused by the influenza virus. Influenza symptoms affect the whole body, including fever and chills, sweating, body aches and pains, headache, bone pain, muscle pain, fatigue, loss of appetite, cough, nasal congestion, etc. In severe cases, pneumonia and other complications can be fatal. The characteristic of influenza virus is that there are many types, and new varieties of virus appear every ten years or so As the saying goes, “The cold is the source of all diseases. Although the cold is not a major disease, but if you do not pay attention to rest and timely treatment, the cold may cause bacterial infections, especially the elderly, children and people with chronic diseases will produce a series of problems: 1, pharyngitis, rhinitis, bronchitis 2, pneumonia: cold, that is, acute upper respiratory tract infection, refers to the inflammation of the nose and pharynx, but if not controlled, the spread of inflammation downward can develop into bronchitis , pneumonia and lead to the recurrence of asthma. 3, viral myocarditis: viral invasion of the myocardium caused. 4, viral meningitis: in the case of decreased immunity and resistance, meningococcal bacteria will enter the bloodstream from the respiratory tract, and then reach the cranium, causing inflammatory changes in meningitis, a series of clinical symptoms. 5, nephritis: nephritis is the body’s immune response to the invasion of streptococci. However, if your immunity is low and you are allergic, streptococcus will cause a metamorphic reaction, which in turn will cause diffuse lesions in both kidneys. 6, rheumatoid arthritis and many other serious diseases: Western medical theory recognizes that rheumatoid arthritis is caused by streptococcal infection. When the human body has a cold, its ability to resist disease and its own immunity decreases, and is prone to streptococcal infection. 7. Otitis media: The opening of the eustachian tube is in the pharynx. When yawning or swallowing, the eustachian tube opens and a small amount of gas enters the middle ear to maintain the balance of air pressure inside and outside the eardrum. Since the growth and development of children are not yet mature, the eustachian tube is relatively short and straight. After catching a cold, inflammation can easily affect the short and straight eustachian tube and then involve the middle ear. Some young people think that they have just caught a cold, while the uncomfortable is not obvious, to play ball, running, painful origin sweat, so that the symptoms of the cold to reduce some, in fact, this is very undesirable, the results of sports can only be like “hold salary to put out the fire”, so that the small cold into a big disease. Because when you exercise, you sweat a lot, the toxins in your body are discharged faster, and on the surface, you can temporarily relieve the symptoms of the cold, but it will lay a lot of “hidden dangers”, because, after intense exercise for about 24 hours, there will be a situation of immune suppression, in which the immune cells start to ” strike”, rest and recuperation, and cold virus invasion of the body, is the need for the immune system to fight with it, no immune cells, cold germs naturally rampant, it is likely to let a small cold evolved into viral myocarditis, pneumonia, rheumatism. At the same time, the metabolism of the body will be relatively strong after exercise, which consumes a lot of sugar, fat and protein in the body, which will weaken the body’s resistance, and the “fragile” resistance often cannot withstand any bacterial attack in crowded sports occasions, aggravating the degree of cold. Strengthening the body’s own resistance to disease is the best way to prevent acute upper respiratory tract infections. Such as insisting on regular and suitable physical exercise, insisting on cold water baths, improving the body’s ability to prevent disease and adapt to cold. Do a good job to prevent cold and avoid the triggers of the disease. Live a regular life and avoid overworking, especially overworking at night. Pay attention to the isolation of respiratory patients to prevent cross-infection, etc.