Abdominal pain, diarrhea, lower back pain; cystitis, enteritis, etc.; difficult urination, enuresis.

In the waist area, on the posterior midline, below the spinous process of the third lumbar vertebra.

Sit or lie face down. Take a line across both anterior superior iliac spines around the waist and abdomen for one week, and push up one vertebra from the intersection of this line with the spine (i.e., the 3rd lumbar vertebra), and the depression at the lower edge of its spinous process is where the acupoint is located.