Gums that bleed when you brush are not normal

Most people who notice pink in the sink assume they brushed too hard, and brush more gently there next time. That is precisely the wrong response, and it is the single most common reason early gum disease is allowed to become late gum disease.

Healthy gums do not bleed. Not when you brush, not when you floss, not when you eat an apple. Bleeding means the gum is inflamed, and gum tissue inflames for one overwhelmingly common reason: a film of bacteria sitting undisturbed along the gumline.

The good news, first

At this stage the condition is gingivitis — inflammation of the gum itself, with no damage yet to the bone underneath. Gingivitis is completely reversible. A professional clean plus a genuine correction to daily technique resolves the great majority of cases within a couple of weeks, and the gums go back to being gums.

There is no scarring, no lasting cost and no ongoing treatment. It is one of the few things in dentistry that can be fully undone.

Why waiting is expensive

Left alone, inflammation eventually spreads from the gum to the bone that holds the tooth in place. That is periodontitis, and it is not reversible. Bone that has been lost does not come back. Treatment from that point is about stopping further loss, not recovering what has gone.

Gum disease is the leading cause of tooth loss in adults — ahead of decay. Teeth lost this way are usually sound teeth, with no cavities, that simply run out of support and become loose.

The cruel part is that it is painless almost the whole way through. There is no toothache to prompt a visit. By the time a tooth feels loose or a gum is sore, a lot of the damage is already done. Bleeding is the warning the body gives instead of pain, which is exactly why it should not be brushed past.

What actually causes it

Plaque forms constantly on everyone's teeth. It is not a sign of poor hygiene that it exists — only that it was left in one place long enough. Where it sits along and just under the gum margin for more than a day or two, the gum responds by inflaming. Hardened plaque, or tartar, then gives the soft plaque a rough surface to cling to and cannot be brushed off at all.

Things that make it worse

• Smoking and tobacco, which both worsen the disease and mask it — smokers often bleed less, because the tissue is less well supplied with blood, so the warning sign is muted while the damage accelerates.
• Diabetes, especially when blood sugar is poorly controlled. The relationship runs both ways: gum disease also makes blood sugar harder to control.
• Pregnancy and hormonal change, which exaggerate the gum's response to the same amount of plaque.
• Some medications, including certain blood-pressure drugs and immunosuppressants, which can cause gum overgrowth.
• Crowded or crooked teeth, simply because they are harder to clean properly.
• Dry mouth, since saliva is a natural defence.

What to do about it

Counter-intuitively, the answer to bleeding gums is usually to clean that area more, not less — gently, correctly and every day. The bleeding typically increases slightly for a few days and then stops as the inflammation settles.

• Clean between the teeth daily. A brush cannot reach the surfaces where gum disease most often starts. Interdental brushes for anything other than tight contacts, floss where the teeth touch closely.
• Angle the brush into the gumline at about forty-five degrees, with small circles and light pressure — not a hard scrub across the teeth.
• Get the tartar removed. Once plaque has hardened, home care cannot touch it. A scaling appointment removes it and gives the gums a clean surface to reattach to.
• Stop tobacco if it applies. Nothing else on this list comes close in effect.
• Mouthwash is optional, and never a substitute. An antiseptic rinse can help for a short course alongside proper cleaning; it does nothing about plaque you have not physically disturbed.

This is general guidance, not a diagnosis. Bleeding gums have several possible causes and only an examination can tell you which one is yours.