Begin by cleaning around the sore tooth meticulously. Using warm salt water, rinse the mouth to displace any food trapped between teeth. UNDER NO CIRCUMSTANCES should you use aspirin on the aching tooth or on the gum. In the event of facial swelling, apply a cold compress to the area. For temporary pain relief, over-the-counter Ibuprofen or Naproxen is recommended. See a dentist as soon as possible.