Knee pain, leg and foot weakness, tuberculous arthritis, beriberi.

At the center of the depression on the upper edge of the patella. (This acupoint is a pair, one on each side)

Sit upright with feet dangling or lie in a supine position. On the knee joint, at the upper edge of the patella (the central bone of the knee), you can feel a depression in the center. Pressing on this spot yields a sour and swollen sensation, which is where the acupoint is located.