Deficiency fire can be divided into two types: yin deficiency fire and qi deficiency fire. The hyperactivity of fire due to yin deficiency is mainly caused by the loss of yin essence in the body. Clinically, there will be symptoms such as upset insomnia, dry mouth and tongue, red tongue without coating, dry stool, tinnitus, dizziness and rapid pulse. Qi deficiency and excessive fire are caused by deficiency of middle qi and endogenous yin fire. Symptoms such as fatigue, shortness of breath, laziness, mental fatigue, shortness of breath, spontaneous sweating, etc.