Gum bleeding while brushing your teeth is a common oral health problem. Although occasional bleeding may seem harmless, frequent gum bleeding should not be ignored. In many cases, it can be an early sign of gum inflammation or another underlying dental problem. Understanding why your gums bleed and knowing when to see a dentist can help prevent more serious oral health problems. What Causes Gum Bleeding When Brushing? There are several possible reasons why your gums may bleed