1. Tooth Decay We all know that the most common cause of toothache is tooth decay. Pain begins when the decay creates a cavity and reaches the nerves that lie in the inner layer of the tooth. A damaged dentin exposes the nerves, which can cause acute pain. When the pain progresses from an ache to a sharp tinge, the tooth decay may have reached the centre of the tooth. If left untreated, the decayed tooth would cause excruciating pain, which can bring the patient down on his or her knees apart from causing further oral damage. If you experience any of these conditions and symptoms above and are wondering which disorder in this list you are afflicted with, call your dentist immediately. A dental professional can identify your ailment with a simple examination. Delay would not only prolong your suffering but transform a small problem into a bigger one. There are multiple options for medications however, ...