Oral infection with Candida: This refers to the infection of the throat and tongue with Candida; of which thrush is the most common one, and this disease is mostly seen in children. People with low innate immune function, people with diabetes and long-term heavy smokers are susceptible to Candida infection. Prevention: Pay attention to oral hygiene, drink warm water frequently, wear a mask in winter, prevent dry lips and cracked mouth, and have balanced nutrition. Countermeasures: Gargle with 3% soda water frequently to interfere with the growth of Candida. Ketoconazole and other fungal drugs can be taken orally to treat oral candida. You can also properly supplement vitamin A and other nutrients.