The causes of redness and anal fissure in baby’s perianal area include constipation, eczema, etc. General treatment, medication and surgery can be used to improve the symptoms, and the treatment is recommended to be carried out under the guidance of a doctor. 1. General treatment: It is recommended to keep the perianal area dry and clean, change comfortable and breathable diapers, drink more water and eat a light diet. 2. Medication: The baby can apply local glycerine lotion, mometasone furoate ointment to relieve the redness, and when constipated, you can use lactulose, keserol and so on to promote laxity. In addition, probiotics can be used to improve the function of the digestive system and constipation, such as Bacillus subtilis bacillus granules. 3. Surgery: When non-surgical treatment fails to improve anal fissure, it is recommended to choose surgical treatment to improve the symptoms under doctor’s evaluation. Therefore, it is recommended that babies with perianal redness and anal fissure should consult the doctor in time, and after actively cooperating with the doctor to accept the treatment, the symptoms can be significantly improved, and promote the recovery. All of the above medications should be used under the guidance of a doctor.