Thrush is caused by Candida (fungus), found naturally in the mouth and on the skin.
Thrush is not a serious problem and can be treated easily.
Review medial history
Physical exam (including mouth)
Antibiotics
Inhaled corticosteroids
Pacifier use
Weakened immune system
Treatment depends on the age of the child, symptoms and medial history. Your child's physician will discuss treatment options with you.
Prevention
Boil bottle nipples and pacifiers and wash cups with soap and warm water
Wash your hands with soap and water before and after caring for your child.