Therapeutic mechanism: The needle is picked at the midpoint of the second knuckle of the index, middle, ring, and little fingers of the left and right hands, for a total of 8 acupuncture points. The four sutures are odd points outside the meridian and are associated in the meridian with the Sanjiao, the Gate of Life, the liver, and the small intestine. According to clinical observation, it has the effect of pacifying the liver and dipping the heart, and regulating the spleen and stomach, so acupuncture can adjust the three jiao, dry dampness and expel worms, and regulate the spleen and produce fluid. It can be used clinically for the treatment of children with chancre; it can also be used with tonics as an adjunctive therapy. According to modern medical research, it is believed that acupuncture at the Four Seams point can increase saliva secretion, improve the role of salivary amylase, and increase the content (digestive strength) of pancreatic protease, pancreatic amylase, and pancreatic lipase in the intestine. For malnutrition combined with rickets, acupuncture of the four suture points was found to increase serum calcium and phosphorus, and decrease alkaline phosphatase activity, resulting in an increase in the calcium and phosphorus product, which helps the child’s bone development and growth. Specific operation: There are two types of acupuncture points: the four suture points and the lipid picking method, the latter of which is used sparingly because of the deep incision and bleeding. The former is the main clinical practice. Pick the fluid method (needle picking four suture points): (1) choose a trigeminal needle (or round sharp needle, sewing needle, 1ml syringe needle) spare. (2) Wash the palm of the child’s hand and disinfect it with a local wipe of complex iodine. (3) Use the sterilized trigeminal needle to prick the center of the above transverse striae, align the pricking point, quickly prick a minute depth obliquely in the direction of the center, slightly lifting and shaking, the operator with the left hand in the ventral surface of the first knuckle to the direction of the tip of the needle, then the needle, the needle mouth can be seen a little sticky yellow liquid (there are also thin liquid oozing more), squeeze with the finger, so that the liquid out, see blood as degree, and then wipe away with a sterilized dry cotton ball. The patient’s fingers were pricked one by one, and the blood was pressed with dry cotton balls, and the child (or parents) was asked to squeeze both fists to stop the bleeding. (4) If the chancre is serious, all the blood will be thick mucus; if it is light, the mucus will be mixed with blood; if it is not chancre, there will be no mucus but blood. (4) In cases with heavy chancre, all mucus is thick, and in cases with light mucus, there is no mucus and only blood is seen.