A toothache that prevents you from eating is usually considered to be a case of apical periapical inflammation of the tooth. This acute form of periapical inflammation causes the tooth to irritate the tip of the root when biting, resulting in severe pain and inability to bite, leading to inability to eat. For this type of toothache, simple anti-inflammatory drugs or painkillers will not completely relieve the symptoms, and it is necessary to go to the dental hospital for formal treatment. A complete root canal is usually performed, which is started after taking dental radiographs to determine the location of the tooth and the inflammation of the root tip. After the inflammation at the root tip is relieved and lifted by the root canal treatment steps, the tooth is usually dared to bite and eat. Therefore, if you have a toothache that prevents you from eating, try not to treat it conservatively, and it is best to treat it as soon as possible, as this condition can also lead to other conditions such as apical cysts.