Swollen gum by molar
A swollen gum beside a molar may come from plaque, an erupting wisdom tooth, decay, or infection around the tooth.
The short answer
A swollen gum beside a molar can result from plaque irritation, food impaction, a cavity, periodontal infection, or inflammation around an erupting wisdom tooth.

What is the direct answer?
What does this question mean?
Molars have broad chewing surfaces and grooves, while the last molar may be partly covered by an operculum as a wisdom tooth erupts. These areas can retain plaque and debris, allowing gingival inflammation or a localized infection to develop.
What can you do next?
Rinse gently with warm water, brush the molar and gumline carefully, and clean between teeth with floss or an interdental brush. A dental examination can include probing, a pulp test, and an X-ray, followed by cleaning, a filling, root-canal treatment, or wisdom-tooth care according to the finding.
When should you seek dental care?
Book care promptly when swelling persists, worsens, or is accompanied by pain on biting, bad taste, pus, fever, or reduced mouth opening. Facial swelling or trouble swallowing or breathing requires urgent medical attention.
What should you ask the dentist?
Ask whether the swelling is around the gum, inside the tooth, or over an erupting wisdom tooth. Ask which examination and X-ray are needed and whether the proposed care removes the cause or only controls the current inflammation.
Frequently asked questions
Why is the gum behind my molar swollen?
The area may be inflamed around a partly erupted wisdom tooth, or it may retain plaque and food that irritate the gum.
Can a swollen molar gum go away by itself?
Minor irritation may settle after careful cleaning, but persistent or recurrent swelling needs an examination to identify and treat its cause.
