A small hole in the baby’s ear may be a preauricular fistula, auricular developmental deformity, sebaceous orifice and so on. 1. Pre-auricular fistula: a relatively common developmental deformity, is the remains of the first gill slit, prone to infection, redness and swelling, gently squeezed and even a little discharge. 2. Auricular developmental deformity: it can be seen in the auricle and the side of the ear canal, due to developmental deformity, the localization is not completely closed with small holes, also belongs to the fistula. 3. sebaceous gland opening: this situation is relatively rare in children, the sebaceous gland opening is relatively thick, it is also easy to appear small holes, extrusion of white secretion, infection can form abscesses. Baby ears have a small hole may also have other reasons, it is recommended to go to the hospital in time to improve the examination to clarify the cause of the disease, give targeted treatment or treatment.