Seeing a little pink in the sink after brushing or flossing can be easy to dismiss. Sometimes gums bleed because a person has just started cleaning between the teeth or is brushing too firmly. But bleeding that happens regularly can also be an early warning sign of gum inflammation. The good news is that early gum inflammation—called gingivitis—is often preventable and reversible with professional care and consistent daily oral hygiene. The key is not to ignore a pattern that keeps returning. Why Do Gums Bleed? Plaque is a sticky film of bacteria that continually forms on the teeth. If it is not removed thoroughly, it can irritate the gum tissue. The gums may become red, swollen, tender, or more likely to bleed. Plaque that hardens into tartar cannot be removed with a toothbrush or floss and requires professional cleaning. Bleeding gums can have more than one possible cause, including: Plaque-related gingivitis or more advanced gum disease Brushing too aggressively or using...