Red swollen gums around crown
Red, swollen gum around a crown commonly reflects plaque irritation, a faulty margin, trapped food, or infection near the tooth.
The short answer
Red, swollen gum around a crown commonly reflects plaque irritation, a faulty margin, trapped food, or infection near the tooth. The crown itself may need cleaning, adjustment, repair, or replacement after the dentist checks the gum and tooth.

What is the direct answer?
What does this question mean?
A crown covers the visible part of a prepared tooth, while the gum forms a seal around its edge. Plaque, an overhanging crown margin, cement left under the gum, or decay at the margin can inflame that tissue.
What can you do next?
Clean gently with a soft toothbrush and clean between the crown and neighbouring teeth with floss or an interdental brush that fits. Do not cut the gum, force an object under the crown, or rely on mouthwash to remove a trapped edge or treat infection.
When should you seek dental care?
Book an examination if swelling or bleeding lasts, the crown feels loose or high, food repeatedly catches, or the tooth is painful when biting. Urgent care is needed for facial swelling, fever, pus, or difficulty swallowing or breathing.
What should you ask the dentist?
Ask whether the crown margin is cleanable, whether decay or a root infection is present, and whether a radiograph is needed. Ask if professional cleaning, gum treatment, bite adjustment, a new crown, or root canal treatment is the appropriate next step.
Frequently asked questions
Can a crown cause gum swelling?
Yes. Plaque, a poorly fitting margin, trapped cement, or an underlying tooth problem can inflame nearby gum.
Should I remove a loose crown myself?
No. Keep it safe, avoid chewing on that side, and have the dentist assess the crown and tooth.
