One and a half year old baby anal fissure, according to the degree of different, the choice of treatment method varies, can be general treatment, drug treatment and surgical treatment and so on to deal with. 1. General treatment: should strengthen nursing, pay attention to diet, drink more water and eat dietary fiber-rich food. In addition, because one and a half year old baby self-repair ability is strong, the degree of mild can often be self-healing, pay attention to follow-up observation can be. 2. Medication: If anal fissure is accompanied by infection, erythromycin ointment can be used for external treatment. More serious patients can also use laxatives to loosen and lubricate the stool to help defecation. The use of specific drugs should be carried out under the guidance of the doctor. 3. Surgery: Surgery can be considered for more serious patients. Surgery includes anal fissure resection, anal canal sphincter amputation and so on. If there is any discomfort, it is recommended to consult a doctor in time and choose the appropriate treatment under the doctor’s guidance. All the above medications should be used under doctor’s supervision.