Inflammation and ulceration of the root behind the ear of the baby, commonly due to bacterial infection, eczema, need to take targeted treatment according to the cause, can be used under the guidance of a doctor, do not blindly use drugs on their own to avoid adverse consequences. 1, bacterial infection: If the baby accidentally scratch the root behind the ear, resulting in local breakage, because the baby’s immunity is not yet sound, and did not pay attention to cleanliness, hygiene, may lead to local bacterial infection, manifested as Inflammation and ulceration. In this case, we need to stop the baby from scratching the affected area, and keep the area clean and hygienic. When washing the face or hair, avoid water in the affected area, and when sleeping, avoid squeezing the affected area, and apply local antibiotic ointment to control the infection, such as erythromycin ointment, under the guidance of a pediatric otolaryngologist or dermatologist; 2. prickly itch, edema, because it is more itchy, the baby often scratch, skin scratching, can appear inflammation, ulceration performance, most of such babies are allergic, in other parts of the body, can also appear this performance. It is recommended to consult a doctor as soon as possible and apply topical anti-allergy ointment treatment, such as Denide cream, under the guidance of a doctor. Since this drug is a topical hormone, the specific dosage and therapy must be applied strictly under the guidance of a doctor, and must not be applied by oneself. In addition, local application of glyburide lotion can be applied to relieve the itching and to avoid the baby from continuing to scratch the area, which can lead to infection. In conclusion, babies with inflammation and ulceration of the root behind the ear need to be treated at the ear, nose and throat department as soon as possible. Usually, they should pay attention to a light diet, avoid eating spicy and stimulating or allergy-prone foods, sleep to avoid squeezing, and keep the root behind the ear clean, dry and hygienic.