Acute necrotising ulcerative gingivitis (ANUG)

 Acute necrotising ulcerative gingivitis (ANUG) is another form of severe gum disease. It used to be called Vincent's gingivitis or trench mouth.

ANUG is rare and usually only affects people with weakened immune system, or people who are malnourished. The ulcers develop after the gums become infected with bacteria.

As well as the ulcers, ANUG causes the gums to swell making it difficult to eat and drink. It can also cause the tissue around the gums to fall away, so that teeth become loose.