What is a dental abscess?

A dental abscess is a localized infection filled with pus that develops in the tooth, gum, or jawbone. Bacteria enter through a cracked tooth, deep cavity, or diseased gum and multiply, creating a painful swelling that signals the body's immune response to fight the infection.

Two main types occur. A periapical abscess forms at the tip of the tooth root, usually caused by untreated decay or trauma. A periodontal abscess develops in the gum tissue and bone surrounding the tooth, often from advanced gum disease or a trapped foreign object.

Symptoms include sharp, throbbing pain, facial swelling, sensitivity to hot or cold, fever, and swollen lymph nodes. Biting or chewing may become unbearable. The swelling can visibly distort the face and neck depending on severity.

This counts as a dental emergency because the infection can spread beyond the initial site, potentially reaching the brain or bloodstream if left untreated. Serious complications include sepsis, a life-threatening systemic infection. Even without rapid spread, the pain renders normal eating and sleep difficult and the bacteria progressively destroys tooth structure and surrounding bone.

Treatment typically involves draining the abscess, removing the source of infection (often through root canal therapy or extraction), and prescribing antibiotics. If you experience sudden facial swelling, fever with tooth pain, or difficulty swallowing, seek emergency dental care immediately rather than waiting for a regular appointment.