What is moxa? Heat therapy in Traditional Chinese Medicine uses what is called moxibustion.  The herb, Ai Ye or artemesia vulgaris, is smoldered on or near points and areas of the body.  Moxibustion moves stagnation through areas, warms the meridians and relaxes muscles.  It is effective in treating joint stiffness, muscle strain, menstrual disorders and general debility.  It can be applied on a needle or held over the skin.