Thrush is a common fungal infection caused by an overgrowth of the Candida yeast, often affecting the mouth or genital area. In the mouth, it appears as white patches on the tongue and inner cheeks, making it uncomfortable to eat or swallow. In the genital area, it can cause itching, redness, and a thick discharge. This condition can occur in anyone but is more common in people with weakened immune systems or those taking antibiotics. Treatment usually involves antifungal medications, which can help restore the natural balance of yeast and bacteria in the body, alleviating symptoms effectively.