Bleeding Gums When You Brush: What They Can Mean and What to Do

You brush, you spit, and there is pink in the sink. It is easy to ignore, because it rarely hurts. But gums that bleed are telling you something, and the earlier you listen, the easier it usually is to put right.

The most common reason: plaque at the gum line

Plaque is the soft, sticky film of bacteria that forms on teeth every day. When it is not cleaned away where the tooth meets the gum, it irritates the gum and the gum becomes inflamed. The NHS explains that gum disease is caused by a build-up of plaque, and lists gums that bleed when you brush or eat hard foods as a reason to see a dentist (NHS).

The early stage is called gingivitis. The gums may look red and swollen, and bleed easily. The good news is that, according to the American Dental Association, gingivitis is still reversible at this stage: it can usually be cleared with a professional cleaning followed by daily brushing and flossing (ADA MouthHealthy).

Left alone, it can progress to periodontitis. Plaque hardens into tartar below the gum line, where a toothbrush cannot reach, and the gum starts to pull away from the tooth and form a pocket. The ADA explains that advanced gum disease can damage the gums and the bone that hold the teeth in place, and that teeth can become loose (ADA MouthHealthy).

Should you stop brushing where it bleeds?

No. It is tempting to avoid the area that bleeds, but that leaves the plaque where it is, and the gum stays inflamed. Brush gently but thoroughly along the gum line with a soft brush, and clean between your teeth every day.

The NHS suggests a simple routine (NHS):

• Brush with fluoride toothpaste at least twice a day
• Spit after brushing, but do not rinse
• Clean between your teeth every day with floss or interdental brushes
• Do not use mouthwash straight after brushing
• Do not smoke

If you have just started flossing after a long break, the gums between your teeth may bleed at first, because that is where the inflammation is. If the bleeding carries on despite careful cleaning, or keeps coming back, it is time to have your gums checked.

What raises the risk

Plaque is the cause, but some things make gum disease more likely. The ADA lists poor oral hygiene, smoking or chewing tobacco, genetics, crooked teeth that are hard to keep clean, pregnancy, diabetes, and some medicines, including steroids, some anti-epilepsy drugs, cancer therapy drugs, some calcium channel blockers and oral contraceptives (ADA MouthHealthy). Brushing too hard, or with a hard brush, can also make gums sore and bleed.

If any of these apply to you, tell your dentist, including any medicines you take. The NHS advises regular check-ups, especially if you are pregnant or have type 2 diabetes (NHS).

Signs to have checked

• Gums that bleed when you brush or floss
• Red, swollen or tender gums
• Bad breath or a bad taste that does not go away
• Gums pulling away from the teeth, or teeth that look longer than they did
• Loose or shifting teeth, or a change in the way your teeth meet when you bite

Gum disease often develops quietly. The ADA points out that gum disease usually does not hurt, so you may not know you have it, which is one reason regular check-ups matter (ADA MouthHealthy). Gums that are very sore and swollen, or teeth that feel loose, should be seen soon rather than at your next routine visit (NHS).

What happens at a gum check

A gum check starts by measuring. At Mineers, a fine probe measures the depth of the gum pocket around every tooth, and X-rays are reviewed to see the bone. Healthy gums are measured in millimetres, and these numbers show whether you have gingivitis, periodontitis or healthy gums.

• If it is gingivitis, a professional cleaning and a better routine at home are usually enough, as the ADA describes.
• If it is periodontitis, a deep cleaning, also called scaling and root planing, removes plaque and tartar from below the gum line and smooths the root surfaces, so the gum can heal and reattach. It is done under local anaesthetic, usually one half of the mouth per session over one or two visits, followed by a review appointment to measure the pockets again. Our deep cleaning page shows each step.

After that, the aim is to keep the gums healthy with daily cleaning at home and regular check-ups. Treatment cannot always reverse damage that has already been done to the bone, which is why it is worth acting while the problem is still small.

Your gums and the rest of your health

Research into gum disease and general health is ongoing. The ADA says that some studies suggest severe gum disease may be associated with other conditions such as diabetes or stroke, while noting that a link is not conclusive (ADA MouthHealthy). Either way, healthy gums are worth looking after for their own sake: they hold your teeth in place.

Gums come first before cosmetic treatment

If you are thinking about veneers, aligners or implants, your gums need to be healthy first. Inflamed gums affect how natural cosmetic work looks and how well it lasts, which is why we check them before any cosmetic plan (Gum Health and Cosmetic Dentistry). If you are nervous about a dental visit, “Will It Hurt?” explains how we keep it comfortable.

Gums bleeding when you brush? Book a consultation and choose “My gums bleed” in the form, or message us on WhatsApp, +961 3 757 127.

This article is general information, not a diagnosis. If your gums bleed often, please have them examined by a dentist.