Most of the vaginal discharge is yellowish in color and high in volume. You need to go to the hospital for internal gynecological examination and take vaginal discharge for examination to clarify the cause of the infection and to guide the clinical use of medication. If necessary, TCT and HPV tests can be performed. According to the description, trichomoniasis is more likely because the leucorrhoea of trichomoniasis is grayish yellow, yellowish white thin liquid or yellowish green purulent discharge, often foamy. Examination reveals congestion of the vaginal mucosa, scattered bleeding spots in severe cases, and even bleeding spots in the cervix, forming a strawberry-like cervix. The treatment requires systemic medication, with metronidazole as the first choice, because vaginitis is accompanied by trichomonas infection in the urethra, paraurethral glands and vestibular glands, and local medication is not as effective as systemic medication.