One gum is swollen
Gum swelling in one spot can come from trapped plaque, irritation, a gum infection, or a problem in the nearby tooth and needs examination if it persists.
The short answer
Localized swelling often reflects irritation or infection around one tooth, rather than a problem affecting every gum.
What is the direct answer?
What does this question mean?
The gum beside one tooth may swell because plaque is trapped, food is impacted, a filling edge irritates it, or an abscess is draining through the gum.
What can you do next?
Gently clean around the area with a soft brush and floss, rinse with warm water, and avoid squeezing or piercing the swelling.
When should you seek dental care?
Seek care soon if swelling lasts more than a few days, bleeds repeatedly, tastes unpleasant, or is paired with toothache. Urgent care is needed for spreading facial swelling, fever, or trouble swallowing or breathing.
What should you ask the dentist?
Ask whether the swelling is periodontal, caused by the tooth root, or due to an irritant. Ask whether probing, a dental X-ray, drainage, cleaning, or treatment of the tooth is needed.
Frequently asked questions
What causes swelling beside one tooth?
Food trapping, plaque, trauma, or infection inside the tooth can cause a local lump.
Can a swollen gum go away without treatment?
Minor irritation may settle after careful cleaning, but persistent or recurrent swelling can indicate infection.