Dadun point is a well point of the foot’s sympathetic Yin Liver meridian, the five elements are wood, and it has the function of enlightening the channels and opening the orifices. The specific location is on the outer side of the big toe, about 0.1 inch from the toenail angle to take the point, that is, 0.1 inch from the toenail side on the inner side of the second toe. The main diseases treated are hernia, scrotum referred to the abdomen, penile pain, menstrual disorders, female avalanche, i.e., blood dripping more than once or going down more than once, blood in urine, retention of urine, i.e., urine does not come out, and enuresis, where normal adults or children do not wet the bed at night, but appear to do so after an abnormality; gonorrhea, i.e., a disease in which the urine is somewhat white and does not drain; diseases of the mind, such as epilepsy; and pain in the lesser abdomen, all of which can be treated with this This acupuncture point can be used to treat.