What are the causes of dental caries in children?

Early childhood caries is a common disease, we often hear parents say don't eat sweets, eat no teeth will be, however, many children are unable to resist the temptation of candy, many children appeared very early tooth, tooth is very painful, meaning worms eat what? Is the cause of dental caries among children?
The children eat too many sweets;
The lack of calcium
We do not pay attention to oral hygiene.
2, how about the symptoms of children's decayed teeth?
Dental caries is often caused by acid attack in the oral cavity, causing the tooth enamel to corrode, become soft, change color, and gradually develop into a cavity. Caries will not heal, such as non - treatment will continue to erode the dentin, pulp, leaving only residual roots.
Not only make the children feel the pain of dental caries and affect the appetite, chewing, digestion, absorption and growth, can sometimes lead to pulpitis, alveolar abscess, and even cause systemic disease affecting the health of children.
Toothache is a kind of pain is unbearable for adults, not to mention the child, and the child is a long body, caries will affect the normal diet of children, brought a lot of harm to children, so parents must remind the children develop good eating habits and health habits.