The pathogens of upper respiratory tract infections mainly include bacteria, viruses, mycoplasma, chlamydia, etc. Generally, influenza viral infection leads to a very large number of upper respiratory tract infections, which is often referred to as influenza. Influenza will appear nasal congestion, sneezing, headache, cough, low fever, loss of appetite and other symptoms, after oral treatment of cold and flu medicine can gradually improve, but the whole process takes about a week or so. The flu, in particular, is prone to recurring illnesses. Pay attention to the air circulation at home, and drink a lot of water to flush out the toxins in the body, pay attention to the cold to keep warm, so as not to aggravate the situation of cold. If the condition is serious, you can also directly carry on the infusion treatment, the effect is faster.