Lumbar and back pain, calf muscle spasms, lower abdominal distension, and difficult urination, etc.

On the lateral end of the popliteal fossa crease, at the medial side of the biceps femoris tendon. (This acupoint is bilateral, one on each side.)

Step 1: Lie prone;
Step 2: At the lateral end of the popliteal crease, you can palpate a large tendon (the biceps femoris tendon);
Step 3: On the medial side of this tendon, there is a depression, which is the location of this acupoint.