[Location] Localized in the erect sitting position,on the radial side of the distal phalanx of the little finger, 0.1 cun distance from the corner of the nail. (Fig.10)
[Regional Anatomy] Skin→subcutaneous tissue→the base of nail. The distuibution of the palmar digital proprial nerve derived from the ulnar nerve, and the arterial and venous network formed by the palmar digital proprial artery and vein.