sho vital point, tender spot; Chinese: Malayalam marmam) in the field of martial arts refers to an area on the human body that may produce significant pain or other effects when manipulated in a specific manner.Techniques of attacks on pressure points are called, Hyol Do Bup (Hangul:) in Korean martial arts, such as Hapkido, Sin Moo Hapkido, Han Mu Do, and kyusho-jutsu (Japanese) in various styl