It is recommended you visit your GP should you present with the symptoms of oral thrush. If left untreated, the symptoms can persist. In more severe cases, untreated oral thrush can carry the risk of the infection spreading further into the body, which can potentially be serious.
In most cases, your GP will be able to diagnose oral thrush with a simple visual examination. The doctor may also take a small scraping from one of the infected plaques in the mouth. This can then be sent to a laboratory, where it can be tested for the presence of the candida fungus.
In some cases, the doctor may recommend a blood test, which will help identify any associated condition, such as nutritional deficiencies or diabetes.