Children’s anal itching at night may be caused by perianal eczema, pinworms, perianal inflammation and other reasons. 1. Perianal eczema: If children live in a long time in a humid, hot environment, do not pay attention to perianal hygiene, or themselves for allergic body, in contact with dust mites, pollen and other things, easy to induce perianal eczema, it will cause anal itching. Especially at night, contact with dust mites on the bed sheets and bedding will aggravate the anal itching symptoms. 2. Pinworm disease: pediatric pinworm disease is usually due to pinworm parasites in the human intestinal tract and caused by the disease, and pinworms are more active at night, due to the increased activity of pinworms at night, which will lead to the child’s night anal itching, may also be accompanied by sleep disturbances, waking up at night and other symptoms. 3. Perianal inflammation: this disease is usually caused by bacterial infection, resulting in inflammatory reaction of the perianal tissues caused by the disease, can lead to perianal itching, pain, redness and swelling. Especially at night, pathogenic bacteria are more active, under the stimulating effect of pathogenic bacteria, it will cause anal itching at night. Children’s night anal itch, may also be caused by other reasons, it is recommended to seek medical advice as soon as possible, after diagnosis of the causative factors, to give targeted treatment and conditioning.