The reflex zone of the foot is an area that reflects people's physical condition. It is divided into sole, medial foot, lateral foot, instep and calf. It is irregularly distributed with dotted lines. The viscera and trachea of a representative person are divided into ten systems: motor system, digestive system, circulatory system, immune system, nervous system and endocrine system. Just like human organs and pipes, some are single and some are symmetrically distributed. The left organ is distributed in the left foot, the right organ is distributed in the right foot, and the symmetrical organ is distributed in the double. The left and right feet are different only in foot reflection zone, and the rest are the same. The left foot is heart and spleen, the left foot is liver and gallbladder, the left foot is transverse colon, descending colon, S-shaped colon, rectum and anus, and the right foot is cecum, ileocecum and ascending colon.