MODEL RELEASED. Patient undergoing acupuncture treatment for hay fever. A needle is being inserted at the inner extremity of the eyebrow, a point on the bladder meridian known as zanzhu. In traditional Chinese medicine, illness is considered to be due to an imbalance of insvital energyins or Ch'i, which flows through the body in twelve pathways or meridians, each meridian corresponding with one of the vital organs. The acupuncturist corrects the imbalance by inserting needles at specific points on the meridians and rotating the free ends to stimulate the energy flow.