Periodontitis, a type of gum disease, is severe inflammation of the gums, with symptoms that include red, bleeding or swollen gums. If left untreated, periodontitis can lead to loss of teeth. Treatment may involve special deep cleaning and, in severe cases, surgery. Regular brushing and flossing can prevent periodontitis.
https://my.clevelandclinic.org/health/diseases/16620-periodontitis

