Acute necrotizing ulcerative gingivitis (ANUG) is a serious infection of the gums that causes ulcers, swelling, and dead tissues in the mouth.

Acute necrotizing ulcerative gingivitis is typically caused by excess bacteria in the mouth.

Risk Factors
ANUG most often impacts people who are 35 years of age and younger. Factors that may increase the risk of ANUG include excess bacteria in the mouth due to:
Lack of dental care
Poor dental hygiene
Poor diet
Vitamin deficiencies
Infections in the throat, teeth, or mouth
A weak immune system

Symptoms may include:
Pain in the gums
Gums that bleed easily
Bad taste in the mouth; extremely bad breath
Red and swollen gums
Gray residue on the gums
Large ulcers or loss of gum tissue in between teeth
Swollen lymph nodes
Red and Swollen Gums

You will be asked about your symptoms and medical history. A dental exam will be done.
Images may be taken of your teeth and face. This can be done with x-rays .
Dental X-ray
Jaw x-ray teeth

Although ANUG is a painful condition, it can be treated. Treatment may include:
Antibacterial mouthwash
Pain control with nonsteroidal anti-inflammatory drugs (NSAIDs), such as ibuprofen or naproxen
Dental surgery
Regular dental cleanings
Antibiotics to treat infection
Changes in diet

To help reduce your chances of ANUG:
Take proper care of teeth and gums.
See your dentist regularly.
Eat a balanced diet.