Acupuncture is a therapeutic physical modality that involves the insertion of extremely fine needles into specific points on the skin. This intervention is utilized within certain systems of medicine to stimulate localized physiological pathways. The process involves careful selection of points and varying needle depths, stimulating tissues beneath the skin. The mechanical stimulation is theorized to influence the body's natural electrical and chemical signals, thereby promoting relaxation and modulating pain response. Variations in technique exist, including the use of electrical currents passed through the needles or the manual manipulation of the needles post-insertion, all of which contribute to the overall therapeutic effect.