Black spots on the teeth of 2-year-old babies are due to the fact that the baby’s tooth surface is not cleaned in time, and black pigmentation on the tooth surface will make black patches on the tooth surface, or a black line along the gum margin. Parents should pay special attention to the maintenance of the baby’s oral hygiene on a daily basis. After the baby eats, especially after eating foods with darker pigments, such as black sesame and chocolate, they should brush and rinse their teeth in a timely manner, and parents should brush the baby’s teeth carefully, at least 2 times/day and for 3 minutes/time, in order to thoroughly clean the tooth surface and prevent the pigment from being deposited on the tooth surface again. It is important to brush your baby’s teeth at least 2 times/day for at least 3 minutes/time to thoroughly clean all surfaces and prevent re-pigmentation. When your baby is old enough to cooperate with the doctor’s treatment, you can take him/her to the hospital for ultrasonic scaling, which means scaling and polishing of the tooth surface to completely remove the black spots on the tooth surface. If there is black spot on the baby’s teeth and there is also tooth loss and cavity, it means that the baby’s teeth are decayed and should be treated as soon as possible, because the baby’s decay will progress very fast and will develop into pulpitis of the baby’s teeth in a short time, causing severe pain.