In the occurrence and development of gastric precancerous lesions（ GPL）

spleen deficiency runs through the course of the disease. With the weakness of the transformation and transporation due to the deficiency of the spleen

the cancer toxin is internally generated

resulting in the malignant transformation of the GPL. The method of expelling toxins from the internal uses the herbs of reinforcing the healthy qi and detoxification to enhance the spleen qi and expel the toxin

and is often used in the treatment of sore diseases. According to the pathogenesis of GPL and the characteristics of the disease

as well as the analogy of traditional Chinese medicine

the GPL can be treated with reference to the internal ulcer. In the process of GPL

the function of zang-fu organs determines the development of GPL. The treatment of GPL by the method of expelling toxins from the internal can strengthening the spleen and stomach qi of the body to expel the pathogens and excrete cancer toxin.