Laundry detergent should not be used for anal dilation. Laundry detergent may irritate the patient’s anal skin and mucous membranes, causing uncomfortable symptoms, and specialized skin and mucous membrane lubrication items should be used. Anal dilatation is also known as anal canal dilatation, generally speaking, it is suitable for anal fissure or hemorrhoids after surgery as an adjunctive treatment. When expanding the anus, you can use fingers to expand the anus or use instruments to expand the anus, no matter which method of expanding the anus, in the process of operation, it is necessary to use to the lubricant, so as not to cause irritation to the skin and mucous membrane around the anus. When expanding the anus, you can not use laundry detergent, laundry detergent is used to clean clothing items, and laundry detergent contains some stimulating ingredients, which will lead to the anal area of the skin is irritated, and in severe cases may cause cracking phenomenon. Anal dilation requires the use of specialized lubricants, such as paraffin oil or drugs such as Keselen. Patients with the need for anal dilatation should seek medical attention in a timely manner. Anal dilatation should be operated by professional medical personnel, and should not be operated on its own and used indiscriminately to dilate the anus in order to avoid accidents.