Itchy buttocks in children may refer to anal itching. Consider with anal eczema, pinworm disease, constipation, sinusitis and other diseases. 1. Anal eczema: the cause of anal eczema is not yet completely clear, and it is considered to be related to the metamorphosis caused by the joint action of internal and external factors. It may lead to varying degrees of erythema, blisters, flaking around the anus, accompanied by varying degrees of itching. 2. Pinworms: pinworms belong to intestinal parasitic diseases, children sleep at night, worms crawl out of the anus to lay eggs, causing local stimulation, resulting in anal itching. It is recommended to carry out routine stool examination, clear diagnosis, under the guidance of the doctor for insecticidal drugs, such as albendazole treatment. 3. Constipation: Long-term poor lifestyle and dietary habits can cause constipation, leading to difficulties in the discharge of stool. Dry stool through the anal opening, resulting in mucosal damage to the anus, the healing process can cause itching. 4. Sinusitis: Sinusitis leads to increased secretions, causing irritation to the perianal area, can also cause itching. It is recommended to pay attention to personal hygiene, if necessary, go to the hospital, combined with the doctor’s advice on medication. In addition to this, do not pay attention to personal hygiene, residual feces on the local stimulation, can cause itching. Recent diarrhea, repeated wiping of the perianal area, can also cause itching. It is recommended to pay attention to personal hygiene, if necessary, go to the hospital to clarify the cause, for the cause of the drug treatment.