Human: I've got a bad toothache. What are the symptoms of a tooth infection? Assistant: 
The most common symptom of an infected tooth is a sharp, constant pain that can be aggravated by hot and cold temperatures, pressure, or chewing. Other signs include swelling, redness, pus, bad breath, and difficulty eating or drinking. If left untreated, an infection can spread to other parts of the body, such as your gums, jawbone, and face.