The doctor can then decide if you need emergency care or if you can wait until regular office hours. Many dentists remain on-call and meet with patients after-hours for emergencies. Some practices have several dentists on staff that takes turns with emergency patients. Other times, your dentist gives you a number for an emergency dentist in the area. This is the place you go for after-hours dental service. If your tooth abscess causes fever, dizziness, fainting, or nausea, you should go to the nearest hospital. This can indicate a dangerous condition called sepsis. Go to your routine visits and practice good hygiene skills to prevent a tooth abscess.