Why does my mouth bleed when i brush my teeth
Bleeding while brushing usually reflects inflamed gums, but trauma, infection, or a medical cause can also contribute.
The short answer
Bleeding during brushing most often comes from inflamed gingiva caused by plaque at the gum margin, although trauma, infection, or a medical problem can also contribute.
What else can make my mouth bleed while brushing?
Hard brushing, a new flossing routine, a broken filling, mouth ulcers, and some medicines can also injure or increase bleeding from oral tissue.
How can I brush and floss without causing bleeding?
Use a soft toothbrush with gentle small movements and clean between teeth daily, while recording where and how often bleeding occurs.
When should brushing-related bleeding be examined?
Book a dental examination if bleeding persists, gums are swollen or tender, teeth feel loose, or there is bad taste, pus, or facial swelling.
What should I ask about bleeding during brushing?
Ask whether the bleeding is from gingivitis, periodontal disease, local trauma, or another cause, and whether you need professional cleaning or periodontal measurements.
Who wrote this page
This library is published by Dental Nation, a licensed dental group practising in the United Arab Emirates. Pages are written and overseen by the same clinical team that treats patients in our clinics, and are held to a fixed editorial standard for safety and accuracy.
This page is patient education, not medical advice, and cannot replace an examination. Anything urgent — facial swelling, trauma, uncontrolled bleeding or severe pain — needs a dentist or emergency care now.