A tooth can start to ache for numerous reasons, but one of the most common is tooth decay and inflammation of the tissue inside a tooth. Various factors can contribute to irritating the nerve inside the tooth, but once the irritant is removed, the nerve normally recovers. If, however, the inflammation doesn’t subside or the tooth doesn’t recover properly after the irritant is removed, the tooth registers the inflammation as pain.
Another common tooth pain is typically more sensitivity than pain, though the momentary sensation of sensitivity is quite painful. A small amount of decay, some minor gum recession or a loose filling could be the cause of sensitivity. Special toothpastes for sensitive teeth do help sensitivity due to gum recession if used regularly. If the sensitivity persists, it’s best to see a dentist for further treatment or advice.
Less common but quite distressing is constant or severe pain or pressure inside the tooth or jaw. This pain could be due to a swelling of the gum or an infection of the root or gum caused by an abscessed tooth. If you do experience significant pain in a tooth, it’s important that you see your dentist as soon as possible.