Cold and fever are very common in life, and everyone will experience cold and fever in their lifetime. Cold and fever have two factors, one is the weakness of their own body, and the other is the role of the external environment. Recently there is overwork, poor rest, often stay up late, alcohol abuse, can cause low resistance. It can also be the season of influenza outbreak if the surrounding environment is harsher or when the seasons change. More pathogens in the surrounding environment can invade the body, reproduce in large numbers in the body, and produce toxins to act on the body temperature regulating point, which can cause a rise in body temperature, that is, fever, and also cause physical weakness, headache, dizziness, and loss of appetite after the flu.