To the summer anal itching may be due to hemorrhoids, perianal eczema, perianal fistula and other perianal diseases. 1. hemorrhoids: due to the hot and humid climate in summer, the anus is often in a humid and unclean state, easy to cause perianal infection, which in turn induces the formation of hemorrhoids; hemorrhoids are often accompanied by the protruding mass, which will lead to an increase in secretion, triggering itching in the anus. 2. Perianal eczema: summer ultraviolet aggravation, and accompanied by hot, sweaty external stimuli, easy to induce perianal eczema. Most of the clinical manifestations of anal itching, pain, with anal flushing, perianal skin ulceration. 3. anal impotence: patients themselves if there is anal trauma or perianal abscess, due to the summer anus hot and humid, poor ventilation, easy to breed bacteria invasion wound, aggravate the condition triggered by anal impotence; anal impotence is mostly accompanied by pus, swelling and pain and other symptoms, pus frequent stimulation of the skin around the fistula, resulting in anal itching. Summer weather is hot to pay attention to perianal hygiene, such as the symptoms of anal itching, please do not self-medication, it is recommended to go to the hospital, under the guidance of the doctor’s diagnosis and treatment, to avoid delaying the condition.