Low fever cold belongs to the manifestation of fever, the patient may be due to infection, inflammation or other diseases caused by fever, thus affecting the regulation of the body temperature center, and then the phenomenon of excessive production of heat, heat dissipation is too low phenomenon occurs, the early in the period of rising temperature will have the phenomenon of chills, manifested as chills and chills. Generally speaking, when the patient has inflammatory infections, the exogenous pyrogens will activate the neutrophils, mononuclear phagocytes and eosinophils in the blood, which will produce and release the endogenous pyrogens, and thus cause the patient’s fever. It is recommended that patients with low-grade fever should go to the internal medicine department of the hospital for consultation, and cooperate with the doctor to clarify the specific cause, and then treat the cause of the disease, which is conducive to relieving the symptoms.