Facial swelling usually develops after an injury, cut, bite, sting, or a dental abscess. However, it may also occur without any known cause. There is usually a localized area of redness, swelling, sometimes heat, and pain. There can sometimes be throbbing pain and fever. An infected tooth with an abscess (collection of pus) is the most common reason for facial swelling (cellulitis) seen in our office. This happens when the bacterial infection causing deep cavities penetrates through the tooth, out through the root, into the bone, and then into the surrounding facial tissues. Facial swelling or cellulitis is a very serious situation. Most often, we can not do any dental treatment Therefore, until the cellulitis is resolved because the local anesthetic used to numb the teeth will not work due to the change in body chemistry. Therefore, we recommend that you see your pediatrician or emergency room physician first in order to receive the proper type of and dosage of antibiotics. Sometimes in order for the antibiotics to be effective, an I.V. antibiotic has to be administered by the medical doctor because oral administration of the antibiotic is not effective and the cellulitis will continue to get worse.