Mouth
Bleeding gums
Gums that bleed when you brush, floss or eat — usually a sign of gum inflammation from plaque build-up, but occasionally a clue to a problem with blood clotting or a wider illness that needs investigating.
Education and reference only. This explains the common causes of bleeding gums and the warning signs that need urgent help, in plain language — it is not a diagnosis or a substitute for advice from a clinician. If you feel very unwell or are worried, seek medical help.
Quick answer
What is bleeding gums?
Bleeding gums are common and in most people are caused by gingivitis — inflammation of the gums from a build-up of plaque along the gum line, which leaves them red, swollen and prone to bleeding when brushing or flossing. This is usually reversible with good oral care and a visit to the dentist.
- Get urgent help: See a doctor urgently if bleeding gums come with widespread or unexplained bruising, frequent nosebleeds, or tiny pinpoint red or purple spots on the skin — these can signal a blood disorder. Seek urgent help if gum bleeding is accompanied by extreme tiredness, repeated infections, fever or unexplained weight loss.
- Self-care: For the usual cause — gum inflammation from plaque — careful, consistent oral hygiene is the cornerstone.
About bleeding gums
Bleeding gums are common and in most people are caused by gingivitis — inflammation of the gums from a build-up of plaque along the gum line, which leaves them red, swollen and prone to bleeding when brushing or flossing. This is usually reversible with good oral care and a visit to the dentist. However, gums are also a window onto the rest of the body, and bleeding from them can occasionally reflect something broader: poorly controlled diabetes worsens gum disease and slows healing; pregnancy hormones make gums more reactive; deficiencies and certain illnesses affect the gums; and, importantly, a problem with the platelets or clotting system can show up as gums that bleed easily. The pattern to watch for is gum bleeding that comes alongside easy bruising, frequent nosebleeds, tiny pinpoint spots on the skin, or unexplained tiredness — this combination can signal a blood disorder such as leukaemia and warrants an urgent blood test rather than being put down to brushing too hard.
When to get help
Call 999 or go to A&E if bleeding gums comes with any of these warning signs:
- See a doctor urgently if bleeding gums come with widespread or unexplained bruising, frequent nosebleeds, or tiny pinpoint red or purple spots on the skin — these can signal a blood disorder.
- Seek urgent help if gum bleeding is accompanied by extreme tiredness, repeated infections, fever or unexplained weight loss.
- Seek urgent help for gum bleeding that is heavy or will not stop, or that follows starting a new blood-thinning treatment.
- See a doctor if gums bleed easily alongside bleeding from other sites, such as in the urine or stool.
- See a dentist promptly for gums that are persistently bleeding, painful, receding or have loose teeth.
When to see a doctor
Bleeding gums that improve with better brushing and flossing and a dental clean are usually due to gum disease and need a dentist rather than a doctor. See a doctor as well, and seek urgent assessment, if the bleeding is heavy or will not stop, or if it comes with easy bruising, frequent nosebleeds, pinpoint skin spots, bleeding elsewhere, fever, repeated infections, extreme tiredness or weight loss — this combination can point to a clotting or blood disorder and needs a blood test. Persistent gum problems despite good oral care, or loose or painful teeth, also warrant a dental review.
Not sure how urgent it is? It is always OK to call NHS 111 for advice, day or night.
What can cause it
Common causes of bleeding gums
Bleeding gums has many possible causes. Each links to a full, plain-language guide to that condition — what it is, how it's treated and when to seek help.
What helps
Self-care and what you can do
For the usual cause — gum inflammation from plaque — careful, consistent oral hygiene is the cornerstone. Brush gently but thoroughly twice a day along the gum line, clean between the teeth daily with floss or interdental brushes, and do not stop cleaning an area just because it bleeds, as the bleeding usually settles once the gums become healthier. See a dentist or hygienist for a check-up and a professional clean, and book regular dental reviews. Not smoking, keeping blood sugar well controlled if you have diabetes, and eating a balanced diet all help the gums heal. If bleeding persists despite good care, or comes with bruising, nosebleeds or tiredness, see a doctor as well as a dentist.
Answers
Bleeding gums: frequently asked questions
Why do my gums bleed when I brush?
Most often this is gingivitis — gum inflammation from plaque along the gum line. It usually improves with gentle, regular brushing and flossing and a dental clean. Keep cleaning the area even if it bleeds, as the bleeding settles as the gums get healthier.
Can bleeding gums be a sign of something serious?
Occasionally. Gums that bleed easily alongside unexplained bruising, frequent nosebleeds, pinpoint skin spots or extreme tiredness can point to a blood disorder such as leukaemia and need an urgent blood test rather than being assumed to be just gum disease.
Does pregnancy make gums bleed?
Yes — pregnancy hormones make the gums more reactive and prone to bleeding. Good oral hygiene and a dental check-up help, and pregnant women are encouraged to keep up regular dental care.
Should I see a doctor or a dentist for bleeding gums?
Start with a dentist, as gum disease is the usual cause. See a doctor as well if the bleeding is heavy or persistent or comes with bruising, nosebleeds, tiredness or bleeding elsewhere, as these features need a blood test.
Sources
Where this is drawn from
- NICE CKS: Gingivitis and periodontitis.
- Oral Health Foundation: gum disease.
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