Small white spots on the tongue may be caused by oral Candida infection, which is a fungal infection. This condition usually appears as small spots or patches involving white as snow, and usually tends to appear on the surface of people with low immunity. In this case, if white spots or patches appear, you should promptly use alkaline preparations to rinse or scrub your mouth. In addition, you can also use mouthwash, such as compound chlorhexidine gargle or baking soda solution, methyl violet solution, etc. This can promote the killing of fungus, and then to improve the resistance of the treatment. Regular exercise and nutritious diet can be given, as well as appropriate medication, such as levamisole or transfer factor, which can promote the body’s resistance to enhance and effectively resist bacterial and fungal infections.