When climbing into bed in an upright position or prone position, there are obviously two depressions above the gluteal muscles, that is, Meiwo, and the eight-claw acupoint is below the inner side of Meiwo, where the sacrum is located.

Also known as maxilla, accessory jaw, middle jaw and mandible, there are eight acupoints on the left and right, which are located in the first, second, third and fourth posterior sacral foramen respectively, collectively called "eight acupoints".

Eight jaws are the eight acupoints of the upper jaw, the secondary jaw, the middle jaw and the lower jaw, so they are called "eight jaws".

This is an area, that is, between Yangguan and Huiyang, adjacent to the Palace. The meat in this area should be soft and can be pinched. If it is not soft, it means that there is adhesion between the skin of meridians. This adhesion is the external manifestation of the body, especially the uterus, and all gynecological diseases are closely related to the uterus. Massage, massage, massage, cupping or moxibustion in the eight-claw area is precisely to regulate the uterus from the outside to the inside. Chong Ren Du Meridian also originated from uterus. Du meridian governs yang, ren meridian governs blood, and chong pulse is the sea of meridians, and all internal organs depend on it. Therefore, Bashu is the confluence of nerves and blood vessels that dominate pelvic viscera, and it is the main switch to regulate people's qi and blood, so it must be unimpeded. When the uterus is healthy, gynecological problems will disappear, and many miscellaneous diseases that plague women, such as insomnia, constipation, irritability, impatience and laziness, will naturally disappear.