Gum disease, also known as periodontal disease, can cause inflammation, tooth loss, and bone damage. Gums in the early stage of periodontal disease (gingivitis) can bleed easily and become red and swollen. If the disease gets worse and becomes periodontitis, teeth may loosen or fall out.
Symptoms of gum disease include bad breath and a bad taste in the mouth. Gum disease is highly preventable, and can usually be avoided by regular brushing and flossing.