Normal female anal structures include the anal canal, perianal skin, and anal sphincter. 1. Anal canal: This is the end of the digestive system, and its presence can reduce the incidence of local infections and ulcers, and play a role in protecting the human body. 2. Perianal skin: This skin contains not only hair follicles, sweat glands and sebaceous glands, but also a large number of lymphocytes. Because of this, the skin has a strong self-cleaning ability. 3. Anal sphincter: Surrounding the anal canal, it consists of a double layer of muscle that prevents the contents of the rectum from flowing out and controls defecation. Normal female anal structure includes anal canal, perianal skin, anal sphincter and other parts, if you have any discomfort symptoms, it is recommended to go to the hospital in time.