Hegu is located on the back of the hand, between the first and second metacarpal bones, at the midpoint of the radial side of the second metacarpal bone. It is located on the back of the hand between the first and second metacarpal bones, at the midpoint of the radial side of the second metacarpal bone, or on the edge of the web of the thumb between the thumb joints of one hand and the thumb of the other hand, when the tip of the thumb points to the point. Hegu acupoint is used for treating headache, neck pain, eye pain, epistaxis (nosebleed), nasal congestion, nasal obstruction, nasal abyss (mainly manifested as foul nasal mucus, the amount of which can not be wiped clean), toothache, deafness, facial swelling, sore throat, mumps, teeth, no sweating, excessive sweating, abdominal pain, dysentery, constipation, amenorrhea, stagnant birth, pediatric convulsions (pediatric disorders with dizziness, apoplexy, and convulsions), pain in the upper limbs, impotence paralysis. Acupuncture is a professional operation, the patient can not be carried out arbitrarily, it is recommended to go to the regular medical institutions to seek professional help, do not operate on their own to avoid adverse consequences.