Why Your Gums Bleed, and Why That Is Not Normal

Almost every week, someone tells me their gums bleed when they brush and that they assume they are brushing too hard. It is an understandable conclusion and it is almost always wrong.

Healthy gum tissue does not bleed under the pressure of a toothbrush. Skin does not bleed when you wash it. Gum that bleeds is inflamed, and inflammation in the mouth has a specific and well-understood cause: a bacterial biofilm sitting where the gum meets the tooth.

What bleeding actually means

When plaque is allowed to mature at the gum margin for more than a couple of days, the body responds. Blood vessels in the gum dilate and become fragile so that immune cells can reach the area. That fragility is what you see in the sink.

At this stage — gingivitis — the process is entirely reversible. Remove the biofilm thoroughly for two weeks and the tissue returns to normal. Nothing has been permanently lost.

Where it becomes serious

In a substantial minority of people, the inflammation does not stay at the surface. It moves below the gum margin and begins to destroy the bone that holds the tooth in place. This is periodontitis, and the bone it removes does not grow back on its own.

The cruelty of periodontal disease is that it is painless for almost its entire course. By the time a tooth feels loose, a great deal has already gone.

Whether you are in the first group or the second is decided largely by genetics, smoking and general health, which is why two people with identical brushing habits can have completely different outcomes. It is also why measuring matters more than guessing.

What measuring involves

A full periodontal chart takes about fifteen minutes. We measure six points around every tooth, record where bleeding occurs, note any recession and mobility, and compare that against the bone level visible on radiographs.

The output is not an impression. It is a number for every site in your mouth, which means the next chart — in three months, or a year — can be compared against it directly. Progression that would be invisible clinically shows up immediately as a trend.

What to do about it

If your gums bleed, three things are worth knowing:

• It is not caused by brushing too hard. Aggressive brushing causes recession and abrasion, which look and feel different. Bleeding is inflammation.
• Stopping brushing the area makes it worse. The instinct to avoid a bleeding spot is exactly backwards.
• Interdental cleaning is not optional. A toothbrush cleans roughly sixty per cent of each tooth surface. The bleeding almost always starts in the forty per cent it cannot reach.

If bleeding persists beyond two weeks of genuinely thorough cleaning, that is the point to have it measured rather than managed. Fifteen minutes of charting is the difference between knowing and assuming, and in a disease this quiet, that distinction is the whole game.