Gingivitis or gum disease. If plaque accumulates at the gumline over time it can irritate and inflame your gums. In early stages, this can be corrected by seeing your hygienist twice a year and practice proper brushing and flossing techniques. In more severe cases, the hygienist will do a more in depth cleaning and recommend a different maintenance schedule to keep your gums healthy such as everything three month cleanings rather than six.