A one and a half year old child perianal purple pimples are considered to be hemorrhoids, but also may be perianal local dermatosis, the specific circumstances need to be examined to determine. Hemorrhoids are usually caused by long-term constipation, the specific pathogenesis is the expansion of local perianal veins, patients often show anal discomfort, which may be accompanied by itching, pain symptoms, severe cases will also appear more perianal mucus secretion, so the child perianal long a purple pimple, more consideration is hemorrhoids. Treatment can use Ma Yinglong musk hemorrhoid cream and other medication, the serious condition can be considered after comprehensive judgment surgical excision treatment, such as hemorrhoidectomy, anastomosis hemorrhoidal mucosal circumcision. In addition, there are purple pimples perianal perianal may also be skin diseases lead to local caused by inflammatory lesions, congestion after a long time to become purple. At this time, you need to go to the hospital dermatology department to find a professional doctor to judge, to see whether it is caused by skin diseases. It should be noted that the above drugs and surgery should be carried out under the guidance of specialized physicians. If a one-and-a-half year old child has purple bumps around the anus, it is recommended to consult a hospital in time to avoid delay.