Unveiling the Health Benefits of Acupoint BL57 (Chengshan) Located at the "human character" (人) indentation on the back of the calf, stimulating this point can improve circulation in the lower limbs, soothe fatigue caused by a sedentary lifestyle, and alleviate sciatica. It is also effective in treating issues such as hemorrhoids and constipation. This guide details precise location methods, home massage techniques, and holistic health strategies that integrate stretching and dietary adjustments.