Candida oralis is a fungus, which is a common conditional pathogen, mainly infecting children, weak and debilitated patients, elderly people and patients with blood disorders. The four manifestations of the oral cavity after oral Candida infection are acute pseudomembranous type, atrophic type, chronic hypertrophic type, and chronic atrophic type. In newborns, the acute pseudomembranous type, commonly known as thrush, is more common. The mucous membrane is congested with scattered soft, snow-like spots, and the child is irritable, has difficulty breastfeeding, and sometimes has a mild fever, but the systemic reaction is generally mild. The elderly with denture Candida infection will appear chronic atrophic type of symptoms, mainly the denture and mucous membrane contact part of the red, diffuse erythema, treatment is mainly local treatment, the disease is serious need systemic medication effect is better, you can use sodium bicarbonate gargle, systemic medication can take antifungal drugs, such as mycophenolate, itraconazole, etc.. For patients with low resistance can be injected immune factor, vitamin supplementation, etc. to improve resistance. In addition, breastfeeding utensils for children should be sterilized by boiling.