Acupuncture points (also called "acupoints or tsubo") are specific anatomical locations on the body that are believed to be therapeutically useful for acupuncture, acupressure, sonopuncture, or laser treatment. Medical science does not currently understand how these points work, but cheap commercial devices can detect changes in the electrical conductivity of the skin at these points. Most of the research into acupuncture mechanisms is taking place in China.