Oral ulcers are characterized by “yellow-red concave pain”, i.e. there is a layer of yellowish-white pseudomembrane on the surface of the ulcers, which is surrounded by reddish color, pain is obvious, and the surface of the ulcers is lower than the surface of the mucous membrane.
Oral ulcers in the oral cavity is often one to a few, the ulcer diameter of three to five millimeters, in the mucous membrane into a rounded concave surface, concave surface covered with a yellowish-white pseudomembrane, can not be removed, the pain is more obvious, the redness around the ulcers, with the ability of self-healing, usually about a week can be self-healing, often recurring episodes.
The appearance of ulcers may be related to external food stimulation or their own body immunity, the etiology is unknown. Mouth ulcers, sometimes do not need to be too nervous, eat less spicy stimulation, if there is a long-term non-healing ulcers, should be timely to the hospital examination and treatment.