While it is rare for a tooth abscess to spread to other parts of the body, it can happen, and the consequences can be quite severe. Signs that a tooth abscess is spreading include: - Swelling in the face, neck, or cheeks - Pain in the mouth and tongue - Nausea and vomiting - Itching sensation on the skin - High fever - Confusion - Difficulty breathing - Persistent headache - Double vision, or loss of vision - Drooping eyelids - Dehydration - Darker urine - Rapid pulse rates and lightheadedness