Upper heat and lower cold (heat in the upper part and cold in the lower part) is a syndrome of heat in the upper jiao, cold in the middle jiao, and mutual obstruction of heat and cold. The upper part of the body manifests heat symptoms such as coughing up yellow phlegm, irritable heat in the chest (irritability and sultriness), eye redness, swelling and pain, and the lower part of the body manifests cold symptoms such as diarrhea, cold limbs, etc. The upper heat and lower cold syndrome needs to be treated with medicines according to the different types of the syndrome. Chicken Neijin enters the spleen, stomach, small intestine and bladder meridians, has the effect of strengthening the stomach and eliminating food, astringent essence and stopping ejaculation (consolidating semen, preventing and controlling spermatorrhea), and promoting gonorrhea and stone removing, and it is mainly used for the treatment of food stagnation (food that is poorly digested and stagnates in the stomach) that does not go away, vomiting, diarrhea and dysentery, urinary discharge, ejaculation, and bile distension and coercion (pain in the area of the coercion and ribs). It should be used with caution for those with spleen deficiency and no accumulation of stagnation. According to the efficacy and main treatment of Jin Nei Jin, it can not be used to treat the upper heat and lower cold, the specific should be identified by a traditional Chinese medicine practitioner after the use of medication, do not blindly use their own medication.