Dry-heat constitution, from the perspective of traditional Chinese medicine, is a relative fire caused by Yin deficiency, manifested as deficiency heat. Symptoms of deficiency heat include zygomatic redness and flushing of the cheeks, easy to have a dry mouth and tongue, love to eat cold beverages, have a hotter temper, and are not easy to get along with others. Dry heat injures the lung, the lung’s qi function is impaired, resulting in the drying up of the essence, causing the symptoms of polydipsia; dry heat injures the stomach, the stomach fire blazing, the stomach’s acceptance and putrefaction of grains and water to enhance the function of the symptoms of overeating and good hunger, dry heat injures the spleen, the spleen does not refrain from the essence of the lungs lose nourishment, leading to polydipsia; dry heat injures the kidneys, the kidney dryness, Jin loss, the kidneys regulate the qi and water is the main physiological function of water is affected, then the clinical manifestations of polydipsia. The treatment of dry and hot body should be adjusted from the perspective of yin tonic, such as the use of raw land, maitong and other yin tonic drugs, should also adjust the work and rest and living habits, try not to stay up all night, to avoid injury to the yin leading to the aggravation of dry and hot.