Mouth bleeds when brushing teeth

Gums that bleed during brushing are commonly inflamed by plaque, but bleeding can also reflect trauma, gum disease, or another medical factor.

Plaque at the gum margin triggers gingival inflammation, making the tissue red, swollen, tender, and more likely to bleed. A hard brush, forceful technique, new flossing, ill-fitting dental work, smoking, and some medicines can also contribute.

Use a soft toothbrush with gentle small motions along the gumline and clean between the teeth daily. A dental professional may remove calculus, measure gum pockets, and treat cavities or periodontal disease if present.

Arrange a dental examination if bleeding continues, gums recede, teeth loosen, or there is persistent bad breath or pus. Seek urgent help for heavy bleeding, facial swelling, fever, or trouble swallowing or breathing.

Ask whether the bleeding is gingivitis, periodontitis, trauma, or a medicine-related issue. Ask which brush, interdental method, and professional cleaning plan fit your gums.