A yeast infection is a common condition caused by an overgrowth of a fungus called Candida. This fungus normally lives in small amounts in the body, particularly in areas like the mouth, throat, and vagina. When the balance of bacteria and yeast is disrupted, it can lead to symptoms such as itching, burning, and unusual discharge. Yeast infections can affect anyone, but they are most often seen in women. Factors like antibiotics, hormonal changes, and a weakened immune system can increase the risk. Treatment usually involves antifungal medications, which can help restore balance and relieve symptoms quickly.