Why Do My Gums Bleed When I Brush My Teeth?

Why Do My Gums Bleed When I Brush My Teeth?

20th March 2026

It starts small. A little blood when you brush, gone before you’ve finished rinsing. Easy to ignore — but your gums are sending you a message.

Bleeding gums can be alarming, especially when it happens during something as routine as brushing your teeth. While it might seem minor, it’s often your body’s way of signalling that something isn’t quite right with your oral health. The good news is that in most cases it’s very treatable — and the earlier you address it, the simpler the solution tends to be. Let’s break down the most common causes and what you can do about them.

So Why Are My Gums Bleeding?

There are a few reasons this can happen, and understanding which applies to you is the first step.

Gum disease (the most common cause)

The most frequent culprit is gingivitis — the early stage of gum disease. It happens when plaque builds up along the gumline, irritating the gum tissue and causing it to become inflamed and sensitive. At this stage, the gums bleed easily when disturbed by brushing or flossing. The encouraging thing about gingivitis is that it’s entirely reversible with the right care.

If left untreated, gingivitis can progress to periodontitis — a more serious form of gum disease that affects the bone supporting your teeth. This is why early action matters.

You’ve just started flossing

If your gums bleed when you floss but you’ve only recently started doing it regularly, this is often simply a sign that the gum tissue isn’t used to being disturbed. In most cases, this settles down within a week or two as the gums become healthier and more resilient.

Brushing too hard

More pressure doesn’t mean cleaner teeth. Aggressive brushing can damage both the gums and the enamel. If you’re scrubbing back and forth, switching to a gentler technique can make a significant difference.

Hormonal changes

Hormones play a bigger role in gum health than most people realise. Fluctuations during pregnancy or puberty can cause the gums to become more inflamed and prone to bleeding.

Medications

Certain medications, including blood thinners and some antidepressants, can make gums more prone to bleeding. If you’ve recently started a new medication and noticed a change, it’s worth mentioning to us.

Is It Serious?

Occasional bleeding from a small cut or a new flossing habit is usually nothing to worry about. But if your gums bleed regularly when you brush, that’s a signal worth taking seriously. Gum disease is one of the leading causes of tooth loss in adults — and it often progresses quietly, without pain, until it’s more advanced.

The reassuring thing is that, caught early, gum disease responds very well to treatment. Whatever stage you’re at, we’re here to support you and get things back on track.

What We Can Do

At Moltons, we start with a thorough assessment of your gum health — checking for signs of inflammation, measuring gum pocket depths, and understanding your brushing and lifestyle habits before recommending anything.

Depending on what we find, support may include:

A professional clean

A scale and polish removes the hardened plaque — known as tartar — that your toothbrush simply can’t shift at home. This is often the most important step in getting bleeding gums under control. At Moltons, we offer traditional hygiene appointments as well as standard GBT (Guided Biofilm Therapy) sessions and comprehensive extended GBT sessions — a modern, highly effective approach to removing bacteria and biofilm from the teeth and gums. Our highly trained and dedicated hygiene team will recommend the most appropriate option for you.

If you want to find out more about GBT treatment, download our leaflet here:

A deeper clean (root surface debridement)

If gum disease has progressed slightly further, a deeper clean beneath the gumline can help remove bacteria from the root surfaces and allow the gum tissue to heal.

Periodontist assessment and treatment

For cases where gum disease has progressed beyond the early stages, we have a periodontist in-house.

Periodontists dedicate their entire career to the health of the gums and the bone that supports your teeth — it’s a level of expertise that goes far beyond general dentistry. Whether you need advanced diagnostic assessment, specialist deep cleaning, or a full gum treatment plan, you’re in highly specialised hands.

Personalised brushing and flossing advice

Sometimes, small changes to your technique or routine make a bigger difference than any treatment. Our hygienists are brilliant at showing you exactly what to do — without making you feel like you’ve been doing everything wrong.

Regular hygiene appointments

For many patients, getting on top of gum health and keeping it that way is about consistency. Regular hygiene visits mean we can catch any changes early and keep your gums in good shape long term.

What Can You Do at Home?

A few simple changes can make a real difference:

• Brush twice a day for two minutes, making sure you cover every surface.
• Use interdental brushes daily — they reach the spaces between your teeth where a toothbrush simply can’t, and are one of the most important things you can do for your gum health.
• Stay well hydrated — a dry mouth allows bacteria to thrive.

When Should You Come In?

If your gums bleed regularly, or if you notice them looking red, swollen, or pulling away from your teeth, book an appointment. There’s no need to wait until something hurts — by then, gum disease has often been quietly progressing for some time.

At Moltons, our team is here to help you understand what’s going on and get your gum health back on track — calmly, clearly, and without any pressure.

Noticed your gums bleeding? Let’s take a look.

At Moltons, our experienced hygiene team works closely with our periodontist to make sure your gum health is in the best possible hands — whether you need a routine clean or more specialist care. We’ll assess where you are and guide you through the right next steps, at your pace.

Call us on 01322 523 813, email info@moltons.co.uk or book online.

This blog is for general information purposes only and does not replace professional dental advice. If you are concerned about your dental health, please contact your dentist.