There are several things which can cause tooth sensitivity, and when caring for child patients, there are a few particular factors to keep in mind. Sometimes, healthy new teeth will be sensitive immediately after breaking through the gum line, but tooth pain could indicate a bigger problem.
Usually, when children get tooth aches, it is because they have cavities (which are also known as caries). In most cases, this problem can be fixed with more disciplined oral hygiene, but it is possible for children to brush too hard and damage their gum tissue. Tooth roots are naturally sensitive, so if gum tissue recession exposes them, the patient will find cold drinks and food painful.
It is also possible for tooth aches to be an early warning sign of diabetes or of bruxism. People who clench or grind their jaws not only damage their teeth, but develop head, ear, and neck aches. Sinus infections can also cause tooth aches in the upper back teeth. These kinds of aches tend to be dull and throbbing, so it is important to get the child to be as descriptive as possible when making a diagnosis.