ANUG Acute necrotizing ulcerative gingivitis (ANUG) is a serious infection of the gums that causes ulcers, swelling, and dead tissues in the mouth.CausesAcute necrotizing ulcerative gingivitis is typically caused by excess bacteria in the mouth.Risk FactorsANUG 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 carePoor dental hygienePoor dietVitamin deficienciesInfections in the throat, teeth, or mouthA weak immune systemSmokingStressSymptoms may include:Pain in the gumsGums that bleed easilyBad taste in the mouth; extremely bad breathRed and swollen gumsGray residue on the gumsLarge ulcers or loss of gum tissue in between teethFeverDiscomfortSwollen lymph nodesRed and Swollen GumsDiagnosisYou 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-rayTreatmentAlthough ANUG is a painful condition, it can be treated. Treatment may include:Antibacterial mouthwashPain control with nonsteroidal anti-inflammatory drugs (NSAIDs), such as ibuprofen or naproxenDental surgeryRegular dental cleaningsAntibiotics to treat infectionChanges in dietPreventionTo help reduce your chances of ANUG:Take proper care of teeth and gums.See your dentist regularly.Eat a balanced diet.