Good question! There are many different reasons the gums bleed, and each points to a different underlying change in your overall health. The most common reason is gingivitis – a superficial infection of the gums. Other reasons include periodontitis (a bone-destroying gum disease), hormonal changes during pregnancy, changes to the health of the immune system, and certain cancers. Be sure to discuss the bleeding with Dr. Jeff and your hygienist at your appointment!