On the posterior midline, in the middle of the sacro-coccygeal hiatus.
- ①Diarrhea, dysentery, hematochezia, constipation, hemorrhoid, proctoptosis, and other intestine diseases;
- ②irregular menstruation, amenorrhea;
- ③pain and stiffness in the waist and spinal column, numbness of the lower limb, epilepsy.
Puncture obliquely upward 0.5-1.0 inch. Moxibustion is applicable.