Back gum is swollen and hurts
Painful swelling at the back of the gum may involve an erupting wisdom tooth, trapped food, gum infection, or a nearby tooth.
The short answer
Painful swelling at the back of the gum may involve an erupting wisdom tooth, trapped food, gum infection, or a nearby tooth. An examination is needed to see whether the tissue over a partially erupted tooth is inflamed or whether decay, pulp disease, or an abscess is the source.
What is the direct answer?
What does this question mean?
The back gum covers part of the last molar area and can trap food and bacteria when a wisdom tooth is partly through the gum. Swelling can also come from the gum pocket beside a molar, a tooth infection, trauma from biting, or irritation from an opposing tooth.
What can you do next?
Rinse gently with warm water, brush the accessible surfaces carefully, and avoid picking or cutting the swollen tissue. Choose soft foods and arrange an examination; do not place undiluted chemicals, aspirin, or sharp objects against the gum.
When should you seek dental care?
Arrange prompt dental care if swelling or pain continues, returns, causes a bad taste, or makes chewing or opening the mouth difficult. Seek urgent help for facial or neck swelling, fever, pus, or difficulty breathing or swallowing.
What should you ask the dentist?
Ask whether a wisdom tooth is erupting, whether the gum pocket or adjacent molar is diseased, and whether an X-ray is needed. Ask whether cleaning, drainage, restoration, root canal treatment, or removal is the appropriate response to the finding.
Frequently asked questions
Can a wisdom tooth cause swelling without severe pain?
Yes. The gum around a partly erupted tooth can become inflamed with mild or intermittent discomfort.
Will salt-water rinses cure the problem?
A gentle rinse may help keep the area clean, but it does not remove a trapped tooth, calculus, decay, or an established infection.