The main techniques of bloodletting therapy are as follows: 1. Slow stabbing: Applicable to venous bloodletting. Such as Quze, the commission, the sun and other points, first with a rubber band on the site should be stabbed, the operator with the right hand holding the trigeminal point aimed at the point or vein pterygium, slowly stabbed into 0.5 ~ 1 minute, and then the needle slowly withdrawn, to be black blood out of red, can be untied rubber band, with sterilized ball rubbing the needle hole for a moment. 2, quick stab: for sore throat, swelling pain, heat stroke, stroke and other diseases. For sore throat, stab Shaoshang; for heatstroke, stab Xuan; for stroke, stab the 12 wells and other points. When stabbing, first pinch the acupuncture point with the thumb, index finger and middle finger. In the right hand, hold the trigeminal needle or milli-needle and stab rapidly for 0.5 to 1 minute, immediately withdraw the needle, then squeeze the area with your hand to make it bleed.3. Stabbing: This stabbing method is applied to the hand, chest, back or head and shallow muscle points. When the needling is aimed at the local rash point, the muscles around the rash point are pinched up with the left hand, and the right hand holds a three-pronged needle to pick up the bleeding horizontally.4. Surrounding pricking: This is applied to carbuncles, paralysis, and plague. It is used to puncture around the redness with a few needles or dozens of needles, then gently squeeze with both hands or use a fire censer to suck out the bad blood to eliminate the swelling and pain. 5.Dense pricking: It is used for skin diseases such as ringworm. When stabbing, the affected area is snapped with a plum blossom needle to make the local area bleed slightly. Precautions: 1. Before bleeding, the patient should be relieved of any ideological concerns, preferably in a recumbent position, and the patient’s reaction and countenance should be observed at all times. 2. Because of the large needle holes after trigeminal needling, strict disinfection and prevention of infection are necessary. 3. The needle blade should be sharp, do not use excessive force when needling, and do not pierce the artery. 4. This method should not be used for weak qi and blood, women after childbirth and those with a tendency to bleed spontaneously, or those who bleed more than once after injury.