Gum (periodontal) disease is the result of the action of bacteria. These bacteria initiate an inflammatory response by causing irritation to the gums when they inhabit the gumline. This leads to swelling and bleeding of gums which worsens the situation because the bacteria make their way easily into the deeper layers of gums. If the gum inflammation remains persistent, the bone gets demineralized and dissolved. If the bone around the teeth is lost, the teeth will become loose and fall out due to lack of support. The whole disease progresses in a painless way and pain develops only in the final stage unfortunately. At this point of time the prognosis gets worsened and there is very little advantage of treating the condition. If there is regular bleeding of your gums, you must get yourself checked and treated at the earliest.