Swollen gum on side of mouth
A swollen area of gum beside a tooth can come from trapped plaque, irritation, an erupting tooth, or a dental infection.
The short answer
A localized gum swelling is a change in the gingiva around one tooth or along the cheek side of the mouth. The cause may be surface inflammation, trauma, food trapped below the gum edge, or infection from a tooth or gum pocket.

What is the direct answer?
What does this question mean?
Rinse gently with warm water, brush with a soft brush, and clean between the teeth without forcing an instrument into the swelling. Do not pierce it or place aspirin directly on the gum; arrange an examination so the tooth, gum pocket, and nearby tissues can be checked.
What can you do next?
Seek prompt care if swelling is painful, enlarging, associated with pus, fever, a bad taste, facial swelling, or difficulty opening the mouth, swallowing, or breathing. A dentist may take a dental radiograph when a tooth-root infection is possible.
When should you seek dental care?
Ask whether the swelling is in the gum or coming from the tooth, whether a pocket or abscess is present, and whether you need cleaning, drainage, a filling, root canal treatment, or removal of the tooth.
Frequently asked questions
Can home care fix the underlying cause?
Home care can reduce irritation, but decay, infection, calculus, cracks, and persistent lesions need clinical treatment.
What will the dentist do first?
The dentist will ask about timing and triggers, examine the mouth, and select tests based on the findings.
