Most people think a little blood while brushing teeth is normal. It is not normal. Bleeding gums are a warning sign from your body.
Inside your mouth live more than 700 kinds of bacteria. Most of the time, your gums act like a strong wall — only one cell thick — that keeps these bacteria away from your blood. But when gums become swollen and infected, tiny openings appear in this wall. When you brush or eat, bacteria can enter your bloodstream through these openings within seconds.
Scientists have found mouth bacteria inside artery plaques that can cause heart attacks and strokes. Researchers have also connected gum disease with Alzheimer's disease and colorectal tumours. The bacteria create inflammation inside the body, and inflammation slowly damages important organs.
A toothbrush cleans only about 60% of the tooth surface. The remaining 40% lies between teeth where bristles cannot reach. In these hidden spaces, bacteria build sticky layers called biofilm. After about 48 hours without proper cleaning, more dangerous bacteria arrive and build a fortress that blocks mouthwash and resists antibiotics.
The good news is that there is a very simple solution: dental floss. Floss can physically break and remove the bacterial fortress from between teeth. Flossing takes only about two minutes and costs almost nothing.
Scientists tested this in a study published in the New England Journal of Medicine. Patients with severe gum disease received deep dental cleaning. Six months later, their artery function improved significantly — similar to the effect seen with some heart medicines.
Healthy gums are not only about having a nice smile. A small piece of floss may look unimportant, but it protects one of the most important borders in the human body.