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Bleeding gums: causes and what to do

Published and checked against the sources below: October 2026

Bleeding gums are most often caused by plaque build-up that irritates the gums (gingivitis). See a dentist if they keep bleeding for more than two weeks.

Common causes

Signs of gingivitis

Red, puffy or swollen gums that bleed when you brush or floss. Early gingivitis can be easy to miss, and with proper treatment it is reversible.

When to see a dentist

See a dentist if your gums keep bleeding for more than two weeks, or if you also have bad breath or swollen gums. You can find a dentist near you with the app.

Check your gums at home

Yuktii Smile Scan looks at your photos for red, swollen or receding gums and gives simple next steps. It cannot diagnose.

Quick answers

Why do my gums bleed when I brush?

Most often plaque is irritating the gums (gingivitis). A new flossing routine can also cause bleeding that settles in about a week.

When should I see a dentist for bleeding gums?

If they keep bleeding for more than two weeks, or come with swelling or bad breath.

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Sources