Stomach pain is generally referred to as stomach pain due to insufficient stomach yin (insufficient yin fluid in the stomach), which is considered to be caused by insufficient stomach yin. Stomach yin insufficiency generally refers to the deficiency of fluid in the stomach, the lack of yin fluid can not moisturize and nourish the spleen and stomach, resulting in the birth of false fire, the loss of harmony and descent of qi, which leads to a hidden pain in the stomach and epigastric burning pain, and will be accompanied by lethargy and fatigue, dry mouth and pharynx, dry stools, five heart heat (the two hearts of the hands and the two hearts of the feet, and self-consciousness of the heart and chest fever), red tongue, little fluids and a series of symptoms. Stomach pain caused by insufficient stomach yin can be treated with Yi Stomach Tang and Maimendong Tang, and the diet needs to reduce the consumption of pungent and dry foods. In case of any of the above mentioned discomforts, one should go to a regular hospital in time and choose the appropriate medication under the guidance of a doctor, rather than self-medicating.