Here are some common symptoms of tooth decay in children:
White spots are formed. These are early signs of breaking of enamel and teeth sensitivity.
Watch out for brown spots. They are early cavities. They can turn into shades of deeper brown or black.
You might miss the above signs as they are not significant until a dentist notices them. But there are some physical signs.
Your child may develop sensitivity to certain foods that they did not have earlier
Toothaches
Pain around the teeth when they chew
Crying