How do I know if I have gum disease?
You may not realize that persistent swollen, red or bleeding gums, tooth sensitivity, and bad breath are warning signs of periodontal (gum) disease -- a serious infection that, left untreated, can lead to tooth loss.

If your answers to the following questions are yes, you may want to seek a thorough oral examination from a dentist.
1.Do you ever have pain in your mouth?
2.Do your gums ever bleed when you brush your teeth or when
  you eat hard food?
3.Have you noticed any spaces developing between your teeth?
4.Do your gums ever feel swollen or tender?
5.Have you noticed that your gums are receding (pulling back
  from your teeth) or your teeth appear longer than before?
6.Do you have persistent bad breath?
7.Have you noticed pus between your teeth and gums?
8.Have you noticed any change in the way your teeth fit together
  when you bite?
9.Do you ever develop sores in your mouth?