Viral infections are the source of the disease Oral ulcers are one of the common oral diseases today, also known as “mouth sores”, which are shallow, small, round or oval ulcers. The most common type of oral ulcer is the “recurrent oral ulcer”, which usually occurs on the lips, tongue or other parts of the mouth and recurs frequently. Recently, clinical and immunological studies have identified the origin of the disease as a viral infection. When people’s immune system decreases, mouth ulcers can flare up. Medical research has also found that these viruses are primary viruses that are present in the human body after infection, hiding in the blood vessels under the epidermis and multiplying in the nucleus of cells. When the body’s immune system is abnormal, such as a cold, it activates the viruses latent in the body, and these viruses will be particularly active and the ulcer will be significantly worse. Mental stress and hormones Mouth ulcers also tend to be a “civilized disease” caused by life patterns, and in fact, according to doctors’ clinical observations, many patients with mouth ulcers develop them after being overworked. Stressful life and mental pressure have led to an increase in this disease. In addition, mouth ulcers are also believed to be related to genetic and hormonal factors, such as the worsening of mouth ulcers before menstruation in women, and the increase in cases among menopausal women, but the incidence of pregnant women is lower, these phenomena show that the occurrence of ulcers are affected by hormonal changes. The majority of oral ulcers occur between the ages of 20 and 50. The onset of the disease is often accompanied by constipation and bad breath. It is generally believed that mouth ulcers will heal on their own within 7 to 10 days. The problem is that many patients often seem to have a recurring condition that comes and goes, affecting their diet and lifestyle in a troubling way. According to Chinese medicine practitioners, to improve recurrent mouth ulcers one should pay attention to smooth bowel movements and adequate sleep. Naturopathic therapists believe that eating more fresh fruits and vegetables can cleanse the stomach and intestines. Also, since mouth ulcers may also be caused by vitamin B2 deficiency, eat more vegetables and wheat germ? and supplement with vitamin B2 and zinc.