“Low back pain? Sciatica? Knee stiffness? There’s one powerful acupuncture point you should know.” It’s called UB40, or Weizhong. This point is located right in the center of the crease behind your knee. In Traditional Chinese Medicine, UB40 is known as the Command Point of the back, which means it has a strong influence on lower back pain, hip pain, and leg pain—especially sciatica. Why is it so effective? Because it helps: Relax tight muscles and spasms Reduce acute and chronic pain Clear exce