Internal heat fever may be caused by food accumulation and heat transformation, as well as by emotional disorders, internal dampness and heat, and external infections. Dietary disorders, indigestion, food stagnation (the accumulation of poorly digested food in the stomach) in the interior, and depression and heat transformation (the transformation of evil qi into heat if it stays for too long) can lead to the development of internal heat and fever. It can be treated with medicines that eliminate food stagnation (promote food digestion), such as Citrus Aurantium Pill. Besides, other factors may also cause fever. Emotional disorders, rage or depression, leading to blockage of qi, depression and heat. Dampness and heat, which are contained in the body and cannot be expelled. All of them can lead to the manifestation of fever in patients. In addition to internal factors, fever may also be caused by wind-cold, wind-heat and other foreign evil invasion. The patient should go to the hospital, after clarifying the specific cause of the disease, under the guidance of the doctor, choose the appropriate program for treatment.