Swelling in back gums
Back-gum swelling may involve a wisdom tooth, trapped food, trauma, or infection and needs an oral examination if it persists.
The short answer
Swelling at the back of the gums can come from an erupting wisdom tooth, gum infection, trapped food, trauma, or a dental abscess, so the cause needs an oral examination.
What is the direct answer?
What does this question mean?
The tissue behind the last molar may be the operculum over a partially erupted wisdom tooth, or it may be inflamed gum beside an infected tooth. Pain, bad taste, pus, fever, or facial swelling make infection more concerning.
What can you do next?
Rinse gently with warm salt water, keep the area clean with a small soft brush, and use ordinary pain relief only if it fits your medical history and label instructions. Do not pierce the swelling or place aspirin directly on the gum.
When should you seek dental care?
Arrange prompt dental care for increasing pain, pus, fever, limited mouth opening, or swelling that spreads into the cheek or neck. Breathing or swallowing difficulty requires emergency medical care.
What should you ask the dentist?
Ask whether a wisdom tooth, gum pocket, decay, or abscess is responsible, whether an X-ray is needed, and whether cleaning, drainage, extraction, or another treatment is indicated.
Frequently asked questions
Can I manage this at home?
Rinse gently with warm salt water, keep the area clean with a small soft brush, and use ordinary pain relief only if it fits your medical history and label instructions. Do not pierce the swelling or place aspirin directly on the gum.
What will a dentist check?
Ask whether a wisdom tooth, gum pocket, decay, or abscess is responsible, whether an X-ray is needed, and whether cleaning, drainage, extraction, or another treatment is indicated.