Where is the exact location of Zhongzhu acupoint?

Zhongzhu is an acupoint of the Sanjiao Meridian of Shaoyang, located on the back of the hand, between the 4th and 5th metacarpal bones, in the depression of the proximal end of the 4th metacarpophalangeal joint. It can treat headache, tinnitus, deafness and other diseases. Direct acupuncture 0.5 - 0.8 inches can be used for moxibustion. Zhongzhu is located on the back of the hand, between the 4th and 5th metacarpophalangeal bones, in the depression of the proximal end of the 4th metacarpophalangeal joint.[Specificity] Zhu, one of the five Shu acupoints, belongs to wood.[Indications] Headache, redness of the eyes, tinnitus, deafness, throat paralysis, pain in the pelvis, shoulder and back pain, lumbago and leg pain, finger flexion and extension, spinal pain, elbow and arm pain, etc.[Operation method] Direct acupuncture 0.5 - 0.8 inch; moxibustion can be used.[Clinical application] Modern commonly used in the treatment of headache, otitis media, nervous deafness, mumps, tonsillitis, acute lumbar sprain, etc.