The Chinese name for the pc muscle is pubococcygeus muscle . The pubococcygeus muscle is the main part of the anorectalis muscle and is located in the innermost part. The muscle fibers start from the inner surface of the descending branch of the pubic bone, go backward along the vagina and rectum, and terminate at the coccyx, of which a small part of the muscle fibers terminate around the vagina and rectum. The pubococcygeus muscle is used by women to maintain their normal sex life, urinary system, bowel function, etc. It is also helpful for women during labor and delivery. For men, the pubococcygeus muscle is mainly related to the male reproductive system, which can help men to have an erection and prolong the erection time. If you have any discomfort, it is recommended to consult a doctor in time, complete the relevant examinations, and carry out targeted treatment under the guidance of a professional doctor to clarify the cause of the disease, so as to avoid delaying the condition.