Gum behind tooth is swollen
Swelling behind a tooth can come from trapped plaque, gum infection, an erupting tooth, trauma, or an abscess, so the area needs examination.
The short answer
Gum behind a tooth may swell when plaque or food collects, a wisdom tooth erupts, or infection affects gum or tooth. A pocket, ulcer, bite injury, or abscess can look similar.
What can the dentist check behind a swollen tooth?
The dentist checks the gum flap, tooth surfaces, pocket depth, drainage, bite, and nearby teeth. A radiograph may be needed near a wisdom tooth, root, or bone.
How can you care for swollen gum behind a tooth?
Rinse gently, brush carefully, clean accessible spaces, and avoid squeezing or piercing the swelling. Choose soft foods and keep aspirin or caustic chemicals off the gum.
When does swollen gum behind a tooth need urgent care?
Seek urgent care for fever, pus, facial swelling, worsening pain, limited opening, or swallowing or breathing difficulty. Persistent swelling needs review.
What tests may identify swelling behind a tooth?
Ask whether the swelling is in a gum pocket or around an erupting tooth, what tests are needed, and whether cleaning, drainage, or tooth treatment is required.
Frequently asked questions
Can it heal at home?
Mild irritation may improve with cleaning, but persistent swelling needs examination.
Is it always a wisdom tooth?
No. Other teeth, gum pockets, trapped food, trauma, or an abscess can be responsible.
Who wrote this page
This library is published by Dental Nation, a licensed dental group practising in the United Arab Emirates. Pages are written and overseen by the same clinical team that treats patients in our clinics, and are held to a fixed editorial standard for safety and accuracy.
This page is patient education, not medical advice, and cannot replace an examination. Anything urgent — facial swelling, trauma, uncontrolled bleeding or severe pain — needs a dentist or emergency care now.