Acupuncture at the point of Commission in the middle can be used to treat diseases of the urinary system, blood-heat diseases, acute diseases, and impotence paralysis of the lower limbs (weakness, numbness and pain in the lower limbs). Situated on the foot solar bladder meridian, the point is the conjunction point of the bladder meridian and the lower conjunction point of the bladder. It is located in the posterior region of the knee, at the midpoint of the popliteal transverse stripe. Acupuncture at the point can be used to treat waist and lower limb disorders such as lumbar back pain and lower limb paralysis; acute abdominal pain, acute vomiting and diarrhea; urinary system disorders such as retention of urine (dribbling of urine or inability to urinate) and enuresis; and blood-heat-induced diseases such as dengtoxin, addictive rashes, itchy skin, furuncle (sores mostly occurring in the limbs or on the face, with a small shape and deep root, as hard as a nail). Acupuncture point can be left in the needle, can also use three-pronged needle puncture bleeding, should pay attention to the needle should not be too fast, too strong, too deep, so as not to damage the blood vessels and nerves, the body of weak people avoid bloodletting. The clinician should be consulted and the acupuncture point should be operated by the physician.