Pain in your tooth and mouth is the primary symptom of a toothache, but the type of pain can vary and present itself in multiple ways:

Sharp, throbbing, or constant pain
Tooth pain that only occurs when pressure is applied
Swelling, painful gums
Bad taste in the mouth (from an infection in a tooth)
Fever or headache

This can happen on of following reasons:


Cavities (tooth decay)
Infection at the root of the tooth
Chipped or broken teeth
Damaged fillings
Repetitive motions (chewing or grinding)
Infected gums


Some behaviors or foods can start your toothache, or even make it worse. They are known as "triggers" and include:

Cold drinks or food
Sweet foods
Biting down on anything
Putting other pressure on the tooth