Fever is a rise in body temperature from any of a variety of causes. One might even feel a fever when body temperature is normal. An imbalance of Yin and Yang due to exogenous pathogenic factors or internal damage is usually considered the cause of fever in Oriental Medicine. Fever from deficiency of Qi is one of the major components of the theory of fever due to internal damage. Clinically, such cases are usually encountered along with wasting diseases and fever does not run high. The compliment of Qi is usually considered the appropriate treatment in these cases. Oriental Medical treatment was performed using herbal medicine after the cause of fever was diagnosed as deficiency of Qi. The herb medicine used in these cases was mainly Bojoongikki-tang(補中益氣湯). Through those treatments good results were seen. More clinical case reports are needed.