The majority of people have a fungus in their mouth called candida. This is a normal fungus that exists in the oral cavity, and most people won’t have an issue with it. However, when something happens that causes the candida to overgrow, oral thrush can happen. Oral thrush is essentially a yeast infection in the mouth as a result of candida overgrowth.
Candida overgrowth often happens when the immune system has been compromised, as the immune system can’t keep the fungus in check. For most, oral thrush won’t go away on its own and will need professional treatment to completely absolve the problem and get your oral bacteria back to normal.
Read the full article here: What Is Oral Thrush and How Is It Treated?