Dried blood between teeth
Dried blood between teeth usually comes from gum irritation, but repeated bleeding can indicate gingivitis, gum disease, or a local injury.
The short answer
A small dark-red or brown deposit between teeth is often dried blood mixed with plaque. The cause may be vigorous flossing, trapped food, inflamed gums, a sharp filling edge, or trauma, and the cause matters more than the color alone.
How can blood become a dark deposit between teeth?
Blood can dry into a brown or black-red film between teeth. Plaque-related gingivitis is common, but a cut, food impaction, calculus, or a rough restoration can also cause bleeding.
How should you clean between teeth after noticing dried blood?
Brush twice daily with fluoride toothpaste and clean between the teeth once daily. If bleeding continues, professional removal of calculus and a gum examination may be needed.
When does bleeding between teeth need dental assessment?
Arrange care for bleeding that recurs, occurs without brushing or trauma, comes with swelling or loose teeth, or is accompanied by easy bruising or bleeding elsewhere.
What should you ask about the bleeding site and irritation?
Ask which site is bleeding, whether there is calculus or gum-pocket inflammation, and whether a filling, crown, or bite is irritating the tissue.
Frequently asked questions
Can home care cure the problem?
Home care may ease irritation or pain, but it cannot remove decay, infected pulp, calculus, or a structural cause.
What will the dentist check?
The dentist will examine the teeth, gums, bite, and nearby tissues, and may use tests or imaging to locate the cause.
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.