Dilatation of the anus is a clinical treatment, and there is no clear clinical data indicating what the harm of dilatation of the anus is, and it generally does not cause significant harm to the anus. Expansion of the anus is generally referred to as anal dilation, mainly in the state of local anesthesia or general anesthesia, with fingers or instruments to expand the anus, mainly through the expansion of the anus, so that the internal and external anal sphincter muscle relaxation. And the method in the clinic can be mainly used for the treatment of anal fissure and internal hemorrhoids, part of the anal canal stenosis also has a certain therapeutic effect. Before the operation, anal dilatation can also make the surgical field clear and convenient for the operation. At the same time, simple anal dilation can stimulate the anus, increase defecation reflex, and anal dilation can also be used for patients with intestinal obstruction, stimulate patients to defecate, if necessary, can also be used with enema. However, this method is a common clinical treatment, and there is no clear data that this method will cause harm to the organism, patients can be reasonable under the operation of professional doctors. Patients are advised to follow the doctor’s instructions to reasonably dilate the anus to achieve therapeutic effect after clarifying their own situation.