<unk>  or necrotizing ulcerative gingivitis(NUG) is an acute necrotic condition affecting the interdental region resulting in pain, bleeding and loss of teeth. The presence of the triad: pain, bleeding and necrotic ulcer is required for the diagnosis, and absence of any one of the criteria rules out the diagnosis of NUG. The pathogenesis of NUG is unclear but is related to the presence of predisposing factors such as acute stress, immunosuppression, malnutrition and poor oral hygiene. These predispose to the formation of a dental plaque, resulting in overgrowth of the bacteria in the interdental area. Invasion of the bacteria into the tissue causes NUG. It is a clinical diagnosis and must be differentiated from herpetic gingivostomatitis. Treatment is primarily by scaling and root planing or gingivoplasty based on the individual patient presentation. The prognosis is variable from patient to patient and recurrence is common in most patients. If left untreated it can progress to necrotizing ulcerative periodontitis or noma. Prevention is by maintaining good oral hygiene with brushing and oral rinsing with oral chlorhexidine.
Trench mouth
Drooling
Excessive tearing
Halitosis
Odynophagia
Sneeze
Nasal Congestion
Ear pain