Symptoms of oral fungal infections are red, swollen and painful mucous membranes in the mouth and white patches on the surface of the red and swollen mucous membranes, including the tongue. In severe cases, the white patches may fuse together to form a white pseudomembrane. Oral fungal infections are caused by infection with Candida albicans and mainly occur in infants, children and elderly people who are weak and have low resistance. The fungal infection in the mouth of children is caused by the feeding dishes of infants and children not being cleaned and disinfected in a timely manner. For elderly people who wear movable dentures for a long time, if the cleaning solution of dentures is not done properly, they are prone to fungal infections and cause fungal stomatitis. Due to fungal infection caused by stomatitis, you can use a weak alkaline solution such as sodium bicarbonate solution to gargle.