When a severe tooth infection manifests with symptoms like excruciating pain that won't go away, swelling of the face or gums, difficulty breathing or swallowing, fever, or an abscess that is draining, it might be considered a dental emergency. A severe tooth infection can spread to other body areas and cause life-threatening problems if it is not treated. Therefore, getting dental care right away if you have these symptoms is crucial to stop the infection from getting worse and get the right treatments.