How do you tell the difference between gingivitis and periodontitis?

See a dentist. The difference is bone loss. Gingivitis is with out bone loss while periodontitis is with bone loss. You should see a dentist to see which you have because it is very important to stop both.
Dental exam. Gingivitis means your gums are inflammed but if it progresses deeper and the bacteria gets into the jawbone, you have periodontitis, you may notice a fetid odor or loosening teeth; but the only sure diagnosis is from a periodontal exam and x-rays with your dentist.
- It is periodontitis when the inflammation of your gums has moved on the the bone and the supporting ligaments of the teeth.