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Bleeding gums – why do my gums bleed?
Gums that bleed when you brush are a common early sign of gum disease. It can often get better with good daily cleaning.
This is general information, not a diagnosis. It does not replace a check by a dentist or doctor. If you are worried, contact a dental professional.
Why it happens
Plaque is a sticky film of germs. When it builds up where the tooth meets the gum, the gum gets red, swollen and sore, and may bleed. This early stage is called gingivitis.
If it is not treated, it can become periodontitis. This harms the tissue and bone that hold teeth in place. Teeth can become loose.
Things that raise the risk
- Smoking.
- Type 2 diabetes that is not well controlled.
- Some people's genes.
- Stress and a poor diet.
What helps
- Brush twice a day with fluoride toothpaste, gently along the gum line.
- Clean between teeth every day. Mild bleeding at first is common. It usually gets better with regular cleaning.
- Do not stop brushing because your gums bleed.
- Stop smoking if you smoke.
When to see a dentist
- Your gums bleed when you brush or eat hard food, and it keeps happening.
- Your gums are painful or swollen.
- You have bad breath that does not go away.
- Your child has sore, bleeding gums.
Get urgent help if
- Very sore and swollen gums.
- Teeth that feel loose.
- A lump, or red patches or ulcers in your mouth.
Ask for an urgent dentist appointment.
Related: Gum treatment (periodontics) · Cleaning between teeth
Sources
Paraphrased in plain words. Links checked and accessed 21 Oct 2026.
- NHS (UK). “Gum disease”. https://www.nhs.uk/conditions/gum-disease/ (accessed 21 Oct 2026).
- European Federation of Periodontology. “Gum diseases (for patients)”. https://www.efp.org/for-patients/gum-diseases/ (accessed 21 Oct 2026).
- European Federation of Periodontology. “What is periodontitis?”. https://www.efp.org/for-patients/what-is-periodontitis/ (accessed 21 Oct 2026).
- Oral Health Foundation. “Cleaning between your teeth”. https://www.dentalhealth.org/cleaning-between-your-teeth (accessed 21 Oct 2026).
- World Health Organization. “Oral health – fact sheet”. https://www.who.int/news-room/fact-sheets/detail/oral-health (accessed 21 Oct 2026).