An oral ulcer is a break in the mucous membrane of the mouth that causes loss of surface tissue and cell death. A study found oral ulcers in 21.7% of patients examined, most commonly affecting women and those in their third and fourth decades of life. Symptoms include pain, sores or ulcers in the mouth, fever, irritability, drooling, and foul breath. Oral ulcers can be classified and differentiated from traumatic, aphthous, or carcinomatous ulcers. Diagnosis involves examinations, blood tests, and biopsies. Treatment includes maintaining oral hygiene, topical analgesics, anti-fungal drugs, corticosteroids, antibiotics, and homeopathic remedies