Why Do My Gums Bleed When I Brush?

Dental Nurse

24th August 2026

Have you noticed blood in the sink when you brush or floss your teeth? Bleeding gums are not something you should simply ignore. While occasional bleeding can have a simple explanation, it is often one of the earliest signs of gum disease.

At Knightsfield Dental in Welwyn Garden City, we regularly see patients who are concerned about bleeding gums. The good news is that, when identified early, gum problems can often be successfully managed with the right dental care and improved oral hygiene at home.

Why are my gums bleeding?

The most common reason for bleeding gums is plaque build-up around the teeth and along the gum line.

Plaque is a sticky layer of bacteria that constantly forms on your teeth. If it isn’t removed effectively through regular brushing and cleaning between your teeth, it can irritate the gums. This can cause them to become:

  • Red or swollen
  • Tender
  • More sensitive
  • Prone to bleeding when brushing or flossing

This early stage of gum disease is known as gingivitis.

Does bleeding when brushing mean I have gum disease?

It can be a sign of gum disease, particularly if the bleeding happens regularly.

Gum disease is extremely common and can develop gradually without causing significant pain. This means that some people don’t realise there is a problem until their dentist or hygienist identifies signs during an appointment.

If gingivitis is left untreated, it can potentially progress to periodontitis, a more advanced form of gum disease that can damage the tissues and bone supporting your teeth.

This is why persistent bleeding gums are worth getting checked.

Should I stop brushing if my gums bleed?

No.

It can be tempting to avoid brushing an area that is bleeding, but this can actually make the problem worse. Continuing to brush gently and thoroughly helps remove the plaque responsible for irritating your gums.

Use a soft or medium-bristled toothbrush and avoid brushing too aggressively. Cleaning between your teeth with floss or interdental brushes is also an important part of maintaining healthy gums.

If you’re unsure which products or techniques are right for you, your dentist or dental hygienist can provide personalised advice.

What causes bleeding gums?

Although plaque and gum disease are common causes, there are several other reasons why your gums might bleed.

1. Plaque build-up

Poor plaque removal is one of the most common causes of bleeding gums. Plaque can accumulate around the gum line and cause inflammation.

2. Gum disease

Gingivitis can cause swollen, red and bleeding gums. If it progresses to periodontitis, you may also notice symptoms such as gum recession, persistent bad breath, loose teeth or changes in how your teeth fit together.

3. Brushing too hard

Using excessive pressure when brushing can irritate your gums. A gentle technique is usually more effective than aggressive brushing.

4. Not cleaning between your teeth

Your toothbrush cannot effectively clean all the surfaces between your teeth. Plaque can therefore build up in these areas, causing inflammation and bleeding.

5. A new flossing or interdental cleaning routine

If you have recently started cleaning between your teeth, you may notice some bleeding initially if your gums are inflamed. With consistent, gentle cleaning, this should generally improve.

If bleeding continues, however, it is worth speaking to your dentist or hygienist.

6. Smoking

Smoking can have a significant impact on gum health and can increase the risk of developing gum disease. It can also affect how the gums respond to infection.

7. Hormonal changes

Changes in hormone levels, including during pregnancy, can make gums more sensitive and susceptible to inflammation.

How can I stop my gums bleeding?

The best way to improve bleeding gums is to focus on removing plaque effectively and maintaining good oral hygiene.

Try to:

Brush twice a day
Brush for around two minutes, using fluoride toothpaste and a suitable toothbrush.

Clean between your teeth every day
Use interdental brushes or floss to remove plaque from areas your toothbrush cannot reach.

Avoid brushing too hard
Gentle, thorough brushing is better than aggressive brushing.

Visit your dentist regularly
Regular dental examinations allow your dentist to identify gum problems before they become more serious.

Consider seeing a dental hygienist
A hygienist can professionally remove hardened deposits of plaque and tartar and provide personalised advice to help you improve your oral hygiene at home.

https://www.knightsfielddental.com/treatment/dental-hygiene

https://www.knightsfielddental.com/treatment/airpolish-tooth-polishing/

When should I see a dentist about bleeding gums?

If your gums bleed regularly when you brush or floss, it’s a good idea to arrange a dental appointment.

You should particularly seek professional advice if you also have:

  • Swollen or very red gums
  • Persistent bad breath
  • Receding gums
  • Sensitive teeth
  • Pus around the gums
  • Loose teeth
  • Pain or discomfort when chewing
  • Changes in the position of your teeth

Early diagnosis and treatment can help prevent gum disease from progressing and help you maintain healthy teeth and gums for the long term.

Looking after your gums in Welwyn Garden City

Healthy gums are an important part of a healthy smile. If you’re experiencing bleeding gums, you don’t need to feel embarrassed — gum problems are common, and getting them checked is an important first step.

At Knightsfield Dental in Welwyn Garden City, our dental team can assess your gums, identify the cause of bleeding and recommend a personalised approach to improve your oral health.

Whether you need advice about your brushing technique, professional hygiene treatment or further assessment of your gum health, we’re here to help.

If your gums are regularly bleeding when you brush, contact Knightsfield Dental in Welwyn Garden City to arrange an appointment.

Frequently Asked Questions

Is it normal for gums to bleed when brushing?
No. While bleeding gums are common, they are not generally considered healthy. Regular bleeding can be a sign of gum inflammation or gum disease and should be assessed by a dental professional.

How long does it take for bleeding gums to improve?
This depends on the cause and severity of the inflammation. Improving your brushing and interdental cleaning can help, but if bleeding persists, you should arrange an examination with your dentist or hygienist.

Can a dental hygienist help with bleeding gums?
Yes. A dental hygienist can remove plaque and tartar that cannot be removed effectively with normal brushing and can give you personalised advice about caring for your teeth and gums at home.

Can gum disease be prevented?
Good daily oral hygiene, regular dental examinations, cleaning between your teeth and professional hygiene care where appropriate can all help reduce your risk of gum disease.

Can gum disease cause tooth loss?
Advanced gum disease can damage the bone and tissues supporting the teeth and may eventually lead to tooth loss. This is one reason why identifying and treating gum disease early is so important.


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Patrick C

I recently had some dental issues with broken teeth and saw Maya for a check-up. Maya gave me options to get my teeth repaired, and I now have 2 lovely new white fillings. I had also misplaced my denture, and Maya made me a new one, which fits so well and is so comfortable. The treatment from start to finish was explained in detail, and I’m really happy with the final results. I highly recommend this dental practice and am pleased to have found such a friendly, helpful team.

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Justin S

Today I had the ‘pleasure’ of a shiny new filling by Nishma, who has become a bit of a household name around here! The kids love her, and now, I have to pretend to be “Dentist Daddy” when brushing their teeth (inspired by Nishma)!

Zero pain.
100% friendliness.
On time.
In and out in 30 minutes.

As always, a lovely experience. Well, aside from the bill, I guess, but thanks to the UK Govt, we have to pay for dental treatment these days, and Nishma’s expertise comes at a fair and appropriate cost. Thanks, Nishma (and your lovely colleague) for a smooth experience (and smooth filling too)!

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Nicola W

So grateful for the care and attention given at this practice every time I attend. Most recently to Maya, Ishira and Sarah for their patience, care in getting me seen and treated as quickly as possible. The phone call to check on me the next day is such a lovely touch; I have never had that at any other dental practice before. Highly recommend this practice!

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Isabelle B

Very professional team. Always on time. Very clean premises. Friendly staff. They seem up-to-date with new techniques and equipment. They take pride in their work. I have had several dentists at this practice over the years, but they are all very good at their job. Can recommend.

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Eric D

Recently changed my dentist to a local one and I have found all the staff here very friendly, caring and most importantly, understanding in terms of my ongoing oral health care. Treatment has been exceptional, easy and importantly pain pain-free and appropriate. Thank you, Anita, Maya and the team.

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Anthony B

Excellent friendly practice, treatment was very good and painless, everything was explained, and great care was taken to ensure my comfort. Good ambience in the waiting room, the appointment was on time. Recommended.

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Ann WR

Totally recommend this Dental Surgery! Maya and her team were very professional and kind. I cannot express how grateful I am to have new crowns and a bridge so that I can smile with confidence. They talked me through every stage, and the final result was brilliant.

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Margo L

Always delighted with the results of any treatment I receive. Face may crumble with age, but my smile shows the benefit of long years of care from Knightsfield Dental Practice.

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Wendy H

Since Anita has been taking care of my teeth, I have been highly satisfied with Knightsfield Dental Practice. She is always bright, positive, caring and very clear about treatment options, which she executes professionally and well. Love my visits now.

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Stuart W

I had an old filing replaced. The procedure was delivered very well, and in a nice, calm atmosphere. The anaesthetic took quite a long time to ease off – more like 4 hours before I could feel my bottom lip and cheek, but I’d rather that than feel the procedure (which I didn’t).

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Nick B

Highly recommend the service at the dentist. Thoroughly professional in the explanation and treatment of my teeth. A great experience, thank you!

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Clare A

I had an old filling that had to be replaced, and I had the treatment today. I can honestly say it was the most relaxing treatment; I didn’t feel a thing, and the dentist and her dental nurse were brilliant.

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Steven W

My treatment was concisely explained from start to finish, including aftercare. I was reminded of each appointment both by phone and email. The professionalism and diligence of Maya, Sarah and all staff were faultless.

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Karen J

I had to go to this practice as an emergency, being a very nervous patient, I can not tell you how nice they were. The dentist informed me of what treatment should be done, and the dental nurse was lovely and held my hand throughout the tooth extraction; they even gave me a coping strategy to use. Cannot recommend them enough, all staff were lovely and friendly.

star blue green plain icon
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Patrick C

I recently had some dental issues with broken teeth and saw Maya for a check-up. Maya gave me options to get my teeth repaired, and I now have 2 lovely new white fillings. I had also misplaced my denture, and Maya made me a new one, which fits so well and is so comfortable. The treatment from start to finish was explained in detail, and I’m really happy with the final results. I highly recommend this dental practice and am pleased to have found such a friendly, helpful team.

star blue green plain icon
google blue red yellow green plain icon

Justin S

Today I had the ‘pleasure’ of a shiny new filling by Nishma, who has become a bit of a household name around here! The kids love her, and now, I have to pretend to be “Dentist Daddy” when brushing their teeth (inspired by Nishma)!

Zero pain.
100% friendliness.
On time.
In and out in 30 minutes.

As always, a lovely experience. Well, aside from the bill, I guess, but thanks to the UK Govt, we have to pay for dental treatment these days, and Nishma’s expertise comes at a fair and appropriate cost. Thanks, Nishma (and your lovely colleague) for a smooth experience (and smooth filling too)!

star blue green plain icon
google blue red yellow green plain icon

Nicola W

So grateful for the care and attention given at this practice every time I attend. Most recently to Maya, Ishira and Sarah for their patience, care in getting me seen and treated as quickly as possible. The phone call to check on me the next day is such a lovely touch; I have never had that at any other dental practice before. Highly recommend this practice!

star blue green plain icon
google blue red yellow green plain icon

Isabelle B

Very professional team. Always on time. Very clean premises. Friendly staff. They seem up-to-date with new techniques and equipment. They take pride in their work. I have had several dentists at this practice over the years, but they are all very good at their job. Can recommend.

star blue green plain icon
google blue red yellow green plain icon

Eric D

Recently changed my dentist to a local one and I have found all the staff here very friendly, caring and most importantly, understanding in terms of my ongoing oral health care. Treatment has been exceptional, easy and importantly pain pain-free and appropriate. Thank you, Anita, Maya and the team.

star blue green plain icon
google blue red yellow green plain icon

Anthony B

Excellent friendly practice, treatment was very good and painless, everything was explained, and great care was taken to ensure my comfort. Good ambience in the waiting room, the appointment was on time. Recommended.

star blue green plain icon
google blue red yellow green plain icon

Ann WR

Totally recommend this Dental Surgery! Maya and her team were very professional and kind. I cannot express how grateful I am to have new crowns and a bridge so that I can smile with confidence. They talked me through every stage, and the final result was brilliant.

star blue green plain icon
google blue red yellow green plain icon

Margo L

Always delighted with the results of any treatment I receive. Face may crumble with age, but my smile shows the benefit of long years of care from Knightsfield Dental Practice.

star blue green plain icon
google blue red yellow green plain icon

Wendy H

Since Anita has been taking care of my teeth, I have been highly satisfied with Knightsfield Dental Practice. She is always bright, positive, caring and very clear about treatment options, which she executes professionally and well. Love my visits now.

star blue green plain icon
google blue red yellow green plain icon

Stuart W

I had an old filing replaced. The procedure was delivered very well, and in a nice, calm atmosphere. The anaesthetic took quite a long time to ease off – more like 4 hours before I could feel my bottom lip and cheek, but I’d rather that than feel the procedure (which I didn’t).

star blue green plain icon
google blue red yellow green plain icon

Nick B

Highly recommend the service at the dentist. Thoroughly professional in the explanation and treatment of my teeth. A great experience, thank you!

star blue green plain icon
google blue red yellow green plain icon

Clare A

I had an old filling that had to be replaced, and I had the treatment today. I can honestly say it was the most relaxing treatment; I didn’t feel a thing, and the dentist and her dental nurse were brilliant.

star blue green plain icon
google blue red yellow green plain icon

Steven W

My treatment was concisely explained from start to finish, including aftercare. I was reminded of each appointment both by phone and email. The professionalism and diligence of Maya, Sarah and all staff were faultless.

star blue green plain icon
google blue red yellow green plain icon

Karen J

I had to go to this practice as an emergency, being a very nervous patient, I can not tell you how nice they were. The dentist informed me of what treatment should be done, and the dental nurse was lovely and held my hand throughout the tooth extraction; they even gave me a coping strategy to use. Cannot recommend them enough, all staff were lovely and friendly.

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