Ms. Yan, 40 years old, has been feeling gloomy recently. She has experienced itching in the genital area and an abnormal increase in vaginal discharge, which has made her restless and in a very bad mood. Her good friend told her that she probably had vulvovaginal candidiasis, commonly known as fungal vaginitis, which is not a serious disease. However, she was still anxious and suspected that she had a severe gynecological disease.