<unk>  <unk>  is a common, non-contagious infection of the gums with sudden onset. The main features are painful, bleeding gums, and ulceration of inter-dental papillae (the sections of gum between adjacent teeth). This disease, along with<unk> <unk>  periodontitis (NP or NUP) is classified as a<unk>  periodontal disease, one of the seven general types of gum disease caused by inflammation of the gums (periodontitis). The often severe gum pain that characterizes<unk>  distinguishes it from the more common chronic periodontitis which is rarely painful. If<unk>  is improperly treated or neglected, it may become chronic and/or recurrent. The causative organisms are mostly anaerobic bacteria, particularly Fusobacteria and spirochete species. Predisposing factors include poor oral hygiene, smoking, poor nutrition, psychological stress, and a weakened immune system. When the attachments of the teeth to the bone are involved, the term NUP is used. Treatment of<unk>  is by removal of dead gum tissue and antibiotics (usually metronidazole) in the<unk>  phase, and improving oral hygiene to prevent recurrence. Although the condition has a rapid onset and is debilitating, it usually resolves quickly and does no serious harm. The informal name trench mouth arose during World War I as many soldiers developed the disease, probably because of the poor conditions and extreme psychological stress.
Acute necrotizing ulcerative gingivitis
Denture-related stomatitis
Contact stomatitis
Idiopathic facial aseptic granuloma
Chronic sclerosing sialadenitis
Disseminate and recurrent infundibulofolliculitis
Aphthous stomatitis
Dental abscess