Gingivitis is an inflammatory condition of the gum tissue caused by the buildup of bacteria on the teeth. It is an early form of gum disease that has not progressed to the point of tissue or bone loss. When plaque is allowed to remain on the teeth, the bacteria within it begins to cause redness, irritation and swelling of the gum tissue. Since gingivitis rarely causes pain, most patients do not even know when they have it. Additional symptoms can also include sensitivity and tenderness of the gum tissue and slight bleeding when brushing, flossing or probing during an examination. You may notice your tooth brush or floss having a slight pinkish tone to them after use. If left untreated, gingivitis will progress, and further complications can arise. It is important to consult with your dentist on the best course of action to halt the disease progression.