Home Remedies for Mouth Ulcers Mouth ulcers are quite common and irritating. These painful, open sores are white in color, surrounded by an inflamed red border. More often than not, they appear on the inside of the cheeks, lips, under the tongue, and on the floor of the mouth. Interestingly, it has been found that women (more than men), adolescents, and those with a family history of mouth ulcers are […]