The reason for the decay is feeding the child with milk or any sweet sticky foods and making him sleep without cleaning or brushing the teeth, especially at night . Please brush the child's teeth before he goes to bed every night , so that further damage of the teeth can be avoided.   Consult a dentist at the earliest, so that the existing decay of the teeth can be rectified. The child's teeth starts to fall only from the age of 6 yrs ,so he needs healthy teeth until then,so try to maintain the teeth .There may be further decay and associated pain if no care has been taken.

Your child has got multiple decayed teeth. It needs to be treated. Kindly visit a dentist for the procedure.

It's nursing bottle caries.if your child has pain or discomfort, get decayed tooth filled.