There are several reasons why babies always scratch their ears: 1. Clinically, babies often have eczema all over the body, accompanied by eczema in the auricle or ear canal, and eczema can lead to localized itching, yellow water and other related manifestations, so children often scratch their ears. 2. 3. Some children may have purulent otitis media secondary to upper respiratory tract infections, sinusitis and other related diseases, which may cause pus in the ear canal, pain in the ear canal and other discomfort, and children may scratch their ears frequently. In short, if your baby is always scratching his or her ears, parents should check the condition carefully and go to the hospital for a checkup depending on the situation.