http://www.oramd.com/recedinggums/2-gumsreceding.htm A mild form of periodontal disease is gingivitis, which may progress to periodontitis and lead to advanced periodontitis. Gingivitis: Bacteria of plaque and tartar produce toxins that irritate gums and cause inflammation. Periodontal disease symptoms may include sore, slightly bleeding gums or bad breath. Gingivitis is a mild form of gum disease that can usually be reversed with daily brushing and flossing, and regular cleaning by a dentist or dental hygienist.