Thrush is caused by an infection with Candida albicans, commonly appearing as a white, membrane-like layer in the mouths of infants that is difficult to wipe off. In such cases, it is important to administer medication promptly. Typically, this involves alternately applying a solution of sodium bicarbonate and an antifungal suspension. Additionally, all items that enter the mouth must be sterilized at high temperatures. With the aforementioned treatment, thrush can generally be well-controlled. If a child is on long-term antibiotics or corticosteroids, preventive application of sodium bicarbonate should be considered. For some newborns, it may be necessary to use antifungals to prevent the occurrence of thrush. (Note: Medication should be administered under the guidance of a professional doctor.)