What Is Oral Thrush? Causes, Risk Factors Of Fungal Mouth Infection

Oral thrush, or oral candidiasis, is a common fungal infection caused by the Candida fungus. This condition manifests as creamy hite lesions on the tongue, roof of the mouth, inner cheeks, gums, and tonsils. While oral thrush can affect individuals of any age, it is particularly prevalent among infants and the elderly. Recognizing and treating this infection promptly is crucial to prevent discomfort and further complications.

What is Oral Thrush?

Oral thrush occurs when there is an overgrowth of the Candida fungus, which is naturally present in small amounts in our mouths, digestive tracts, and on the skin. An imbalance in the body’s natural environment can lead to the proliferation of this fungus, resulting in oral thrush.

How To Identify Oral Thrush? 

The primary symptom of oral thrush is the appearance of white patches in the mouth. Attempting to remove these patches often leaves behind red, tender areas. Additional symptoms include cracked corners of the mouth, a persistent unpleasant taste, pain, and difficulty eating or drinking. Infants with oral thrush may exhibit a thick white coating resembling cottage cheese on their tongues and might be irritable or reluctant to feed.

Causes and risk factors

According to the National Institutes of Health, 65% of infants in the United States contract Candida albicans, the primary cause of oral thrush. Adults are also susceptible, with 30-60% affected. Factors contributing to oral thrush include malnutrition, age extremes, metabolic diseases, weakened immune systems, prolonged antibiotic or steroid use, and exposure to yeast in the environment. Infants can contract the infection during birth or through breastfeeding.

A weak immune system is a significant risk factor for oral thrush, as it disrupts the balance of microorganisms in the body. This imbalance facilitates the overgrowth of Candida fungus. Other notable risk factors include HIV, chemotherapy, cancer treatments, and diabetes. High blood sugar levels provide an ideal environment for yeast growth, further increasing the risk of oral thrush in diabetic individuals.