Warming point for cold or cold damp in the lower warmer, often treated with moxa for low back pain from deficiency, women's discharges (leukorrhea) due to cold, dysmenorrhea, irregular menstruation, impotence, seminal emission, infertility, incontienence, colities, edema, pain or weakness of the lower limb or knee.
Name is "lumbar gate" or "lumbar hinge," at this point the low back bends in flexion, treat for pain when bending forward.
Differentiation: GV 3 is a more local point whereas GV 4 is for back pain resulting from yang deficiency
