see also:

• dental
• dental caries
• periodontitis

• simple gingivitis is very common and painless and mainly due to poor dental hygiene - see periodontitis
• acute ulcerative gingivitis is relatively common and painful, and usually caused by primary Herpes simplex virus (HSV) infection, or hand, foot and mouth infection in children
• see also mouth ulcers
• occasionally, acute necrotizing ulcerative gingivitis may occur

• acute non-contagious severe gingivitis, most common in young adults or malnourished children
• it was called trench mouth in WWI soldiers
• painful, bleeding gums and ulceration and necrosis of the interdental papilla and usually is associated with halitosis
• may lead to necrotizing ulcerative periodontitis
• see Vincent's gingivitis - fusospirochaetal necrotising gingivitis