Gum is the red soft tissue around the teeth, also known as dental flower child, gum congestion and redness generally have the following two causes: 1, due to plaque biofilm composed of tartar long-term chronic stimulation: resulting in this condition is often a full mouth extensive gum bleeding, redness, and swelling, while in the clinic is very common, known as chronic periodontitis, the incidence of chronic periodontitis in the population close to 90%; 2, due to the stimulation of certain foreign objects: such as eating into the mouth of fish spikes or other sharp food, mechanical puncture of a gingival papilla to make it congestion, redness, swelling, known as gingival papillitis, this condition is often limited to a particular gingival papilla.