The problem is rather dangerous to our overall appearance as the person risks losing teeth on the final stage of the gum disease development. It is a common issue among older adults. How does periodontitis appear? When the toxins discovered in plaque start to annoy the gum, cause the swallowing, or even ruin the corresponding bone, the disease becomes obvious. Thus, it is better to handle it at the early stages. Those are the consequences of a bacterial infection called gingivitis.