The main causes of thrush are fungal infections and some diseases that lead to thrush. If thrush recurs it is necessary for patients to consider the problem of their own habits. The need to improve immunity, pay attention to oral hygiene, home protection and other issues Thrush is caused by fungal infections, and once the fungus has its own living environment it will proliferate, which will lead to recurring thrush. Some diseases can lead to a weaker immune system so that the bacteria are not well defended, in which case thrush can also be triggered. Treatment of the primary disease and aggressive use of various methods to boost the immune system are needed to reduce recurring thrush. To prevent recurring thrush, patients need to pay more attention to their oral hygiene, rinse their mouths frequently, and use salt water gargles, all of which can inhibit the growth of bacteria so that the disease can be prevented from occurring. There are some infants who also suffer from thrush. In order to prevent transmission between mother and child, medication should be given to both sides, and the use of nursing pads when the child is breast-fed will prevent the fungus from reaching the clothes and avoiding secondary infection in the child. Parents should carefully rinse the child’s bottle during normal times and use salt water to rinse and kill bacteria, which will prevent the growth of bacteria that can cause recurring thrush. The main way to avoid thrush is to prevent the growth of bacteria and to pay attention to personal cleanliness and the cleanliness of objects in order to avoid recurrence.