The tampon is mainly made of cotton, rayon, or a mixture of these two materials. It has a diameter of 1 cm to 1.9 cm, and a cotton thread (drawing rope) is attached to the end. The degree of arc of the tip of the sanitary plug varies from brand to brand,allowing users to choose according to their own habits. The body of the sanitary suppository often has linear or twill-shaped indentations, which can increase the drainage capacity of the sanitary suppository and fit the vaginal wall when it absorbs menstrual blood and swells. Catheter-type sanitary plugs are equipped with paper or plastic catheters for easy introduction of tampons. The overall structure of the catheter is divided into an outer tube and an inner tube. The outer tube has a smooth surface and a rounded tip for easy insertion. The front end of the outer tube has a petal-like opening. The function of the inner tube is to push the sanitary plug out of the outer tube flap type opening in a piston-type