Cause of 1: Immune system abnormalities

When the body's immune system abnormalities, some exist in the oral cavity within the virus or bacteria will be particularly active, will lead to significant deterioration of ulcers. And such viruses are mostly primary virus, human infection exists after the body hidden in the blood vessels under the skin, and in the nucleus breeding. Common as streptococcus, staphylococcus aureus, Pseudomonas aeruginosa and E. coli, etc.

Etiology 2: fatigue

Experts believe that modern life is stressful, mental stress, to make oral ulcers become a form of living, caused by "diseases of civilization." Clinical observation that patients with oral ulcers, many of morbidity in the post-fatigue. Because of physical fatigue, mental is not so good environment can lead to imbalances in the body, will activate the latent virus in the body, leading to ulcers

Cause of 3: the impact of hormonal changes

Oral ulcers are considered to be genetic, hormonal and other factors, such as women have premenstrual deterioration of oral ulcers, menopausal women also have increased cases of the phenomenon, but the women during pregnancy, then the incidence is relatively low, these phenomena show that the occurrence of ulcers by the hormone change impacts.