Acupoints are points on the surface of human body where meridian qi infuses, hence the Chinese name qixue (气穴, literally qi points). They are the points where qi of the zang-fu organs and meridians concentrates or passes, where needling can be applied, and where some diseases or pains are manifested or felt. The points, closely linked to zang-fu organs through meridians, can manifest the physiological and pathological changes in zang-fu organs. Various stimuli such as needling, moxibustion, and massage can be applied at acupoints to increase immunity against diseases, regulate deficiency and / or excess conditions, prevent and treat diseases, and in some cases aid diagnosis.