The symptoms of yeast vaginitis primarily manifest as an increase in vaginal discharge, characterized by a thick, cottage cheese-like white discharge. It can cause itching and a burning pain in the external genitalia. In severe cases, it may lead to redness and persistent scratching of the external genitalia, resulting in ulceration. The itching can be more pronounced at night. It may also irritate the urinary meatus, leading to redness and symptoms of bladder irritation such as frequent urination, urgency, and painful urination. Yeast vaginitis is mainly due to an imbalance in the vaginal flora, leading to an overgrowth of yeast, which produces abnormal discharge. This condition is primarily an endogenous infection. When the body's resistance diminishes and immunity is lowered, yeast vaginitis can easily occur. Some cases may be transmitted directly through sexual intercourse, or indirectly through contact with contaminated clothing. However, it is mainly caused by endogenous infection.