According to National Health Service UK (NHS UK), gingivitis is the early stage of gum disease which usually refers to swollen, sore and infected gums. If it worsens, it affects the bones that wrap and support the teeth and is the main reason why adult teeth fall out. There is no pain in the early stages and this periodontal disease may not be visible to the naked eye. However, when it occurs, it is very uncomfortable and in some severe cases, cannot be treated.
There are three main stages of this disease from mild to severe, including: gingivitis, periodontitis and severe periodontitis. Each has different symptoms and requires different forms of treatment.
Stage 1: Mild Gingivitis
Stage 2: Periodontitis
Stage 3: Severe Periodontitis