Bloodletting in the stomach is usually not dangerous. It is located at the midpoint of the popliteal transverse stripe in the area behind the knee. It can treat low back pain, lower limb impotence paralysis (weakness, numbness and pain in the lower limbs), abdominal pain, cryptorchid rash, dengteng (acute infectious disease, which can be seen as reddening of the skin like paint), urinary incontinence (unruly urination), enuresis and other diseases, and it is one of the commonly used acupuncture points in clinical practice for treating low back disorders. Before bloodletting operation, patients should pay attention to not be overly tired, full meal or strenuous exercise, otherwise it is easy to cause fainting or fainting, etc., and after bloodletting is completed, more pressure should be applied to the operation site, so as to avoid the emergence of hematoma and so on, and avoid strenuous exercise or bathing, etc., after the treatment. If you need bloodletting in the commission, you should go to the hospital for a clear diagnosis and operation by the doctor, and not blindly operate on your own, so as not to cause adverse effects on the body.