Gum swelling at back of mouth
Back-of-mouth swelling may involve an erupting wisdom tooth, gum pocket, decayed molar, or deeper dental infection.
The short answer
Swelling at the back of the mouth may involve the gum around a partially erupted wisdom tooth, a periodontal pocket, a decayed molar, or an infection in the tooth or surrounding tissue.
What is the direct answer?
What does this question mean?
The tissue behind the last molar can form a flap over an erupting third molar, trapping plaque and food. Examination may include probing, checking jaw opening and swallowing, and a radiograph to assess the tooth’s position and roots.
What can you do next?
Keep the area as clean as you can with a small soft brush, rinse gently, and avoid picking under the gum flap. Use only pain medicine that is suitable for you and follow its label or clinical advice.
When should you seek dental care?
Seek urgent care for spreading swelling, fever, pus, worsening pain, difficulty opening the mouth, or any difficulty swallowing or breathing.
What should you ask the dentist?
Ask whether the swelling is pericoronitis, decay, periodontal disease, or a deeper infection; whether cleaning, drainage, root canal treatment, or removal is needed; and what prevents another episode.
Frequently asked questions
What is the main point?
The tissue behind the last molar can form a flap over an erupting third molar, trapping plaque and food. Examination may include probing, checking jaw opening and swallowing, and a radiograph to assess the tooth’s position and roots.
What can I do now?
Keep the area as clean as you can with a small soft brush, rinse gently, and avoid picking under the gum flap. Use only pain medicine that is suitable for you and follow its label or clinical advice.
When is care urgent?
Seek urgent care for spreading swelling, fever, pus, worsening pain, difficulty opening the mouth, or any difficulty swallowing or breathing.