Which point is on the dorsal aspect of the big toe, at the junction of lines drawn along the lateral border of the nail and the base of the nail, approximately 0.1 cun from the corner of the nail?

• A. GB44
• B. GB42
• C. LV4
• D. GB43

Answer: (A)

Understanding how to locate toe points relies on using the nail edge as a landmark and applying small cun measurements from the nail corners. The description given—on the dorsal surface of the big toe, at the junction where lines drawn along the lateral border of the nail and the base of the nail meet, about 0.1 cun from the corner of the nail—points directly to GB44. This spot is precisely described as being at the lateral nail corner on the top surface of the toe.

Other options do not sit at this nail-corner location on the big toe. The other points are located elsewhere on the dorsum of the foot or between different toes, not at the nail edge of the big toe.