The basic body science is we are 30% water and 70% Earth. We are made of what we use as nourishment. The body has a microbiological environment, that is many microbes naturally resides upon us. We have a symbiotic association with them. The thrush is dominant upon others because of your poor immunity, which is again due to a mismanaged lifestyle. Correct your internal chemistry.
Next Steps
Go through the article in my publication on health feed of Practo. Holistic healing and science of disease genesis will be helpful.
Health Tips
For acute stage consult a local doctor. Prevention needs lifestyle modification.