In real life, it is common for people around to see their children’s teeth have many cavities, no matter it is painful or not, they do not take their children to the hospital for treatment. They think: milk teeth always have to be replaced, it doesn’t matter if they are broken. Besides, children’s teeth do not hurt, if they go to the hospital to fill the teeth, it will cause unnecessary pain and fear to children. These ideas are not only wrong, but also may cause lifelong regret. The incidence of caries is high and there are many children suffering from it, which brings great danger to children’s health. Children with cavities in their milk teeth should be treated in hospital actively, and the earlier the better. If the cavity is shallow and small, it can be filled once. Otherwise, the cavity will become bigger and deeper from small to shallow, and then it will invade the nerve of teeth and cause unbearable pain, so that the child can’t eat and sleep well, which will directly affect the child’s study and physical and mental health. In addition, the untreated caries may continue to develop and even combine with local infection, causing facial swelling, fever, lymph node enlargement, etc., which will produce bad consequences. Sometimes the caries of the child is so serious that only the roots of the teeth are left and they are repeatedly red, swollen and inflamed, so the bad teeth can only be pulled out. If the baby teeth are missing too early, one of them will affect the normal development of permanent teeth, and the neighboring teeth will be inclined to the gap of missing teeth, which will affect the eruption of permanent teeth and cause malocclusion. In addition, if the child’s teeth have holes, unilateral chewing, over time will affect the child’s jawbone development, and even both sides of the face asymmetry, affecting the child’s facial beauty. This shows that it is very important to protect your child’s milk teeth for the sake of their health. As a parent, once you find a hole in your child’s teeth, you should take your child to a regular hospital as soon as possible to have it filled, and not to let it develop and cause adverse consequences.