Bleeding while brushing is often dismissed as “I brushed too hard”. In fact, healthy gums do not bleed. Bleeding is almost always the first sign of inflammation.
The most common cause: plaque
Bacterial film on the tooth surface causes gum inflammation within 24–48 hours. This early stage, gingivitis, is fully reversible with correct cleaning and scaling.
If it progresses: periodontitis
Untreated, inflammation reaches the bone supporting the tooth. Bone loss begins and lost bone does not return. Signs include gum recession, new gaps between teeth, bad breath and, later, loose teeth.
Other contributing factors
- Hormonal change in pregnancy and adolescence.
- Some medicines — blood thinners and certain blood-pressure drugs.
- Smoking — it actually suppresses bleeding and masks disease, so periodontitis is detected later in smokers.
- Uncontrolled diabetes.
- Incorrect flossing or poorly fitting restorations.
What to do at home
When bleeding appears, brushing should be continued correctly, not reduced. Gentle cleaning at 45 degrees with a soft brush plus daily flossing markedly reduces plaque-related bleeding within 1–2 weeks in most cases.
Bleeding that persists beyond two weeks, recession or loose teeth require periodontal examination. Early treatment is short and simple; delay may require surgery.