Trichomonas vaginalis is a vaginal inflammatory disease caused by Trichomonas vaginalis infection, which is a common type of vaginal inflammation in women and a common sexually transmitted disease. Trichomonas vaginalis infection is most directly and primarily transmitted through sexual contact. Trichomonas vaginalis can be found in the vaginal folds of women, or in the foreskin folds, urethra or prostate of men, and can cause trichomoniasis or trichomoniasis when one of the two partners in a sexual encounter is infected with Trichomonas vaginalis. Trichomonas vaginalis can also be transmitted indirectly to the patient via public baths, tubs, bath towels, swimming pools, bidets, contaminated clothing, and contaminated instruments or dressings. Trichomonas vaginalis infection has an incubation period of 4-28 days, so 25-50% of patients are asymptomatic at the beginning of the infection. As the infection lengthens, the main symptoms such as increased vaginal discharge and itching of the vulva or vaginal opening will appear. The vaginal discharge is characterized by a thin, purulent, foamy, odorous, grayish or yellowish-white color; if combined with other infections, the color may be yellowish-green. If the symptoms are severe, there may be burning, pain and painful intercourse in the vulva or vagina. If the infection continues to worsen and is combined with a urinary tract infection, there may be frequent, urgent, painful urination and even fever. Therefore, patients should be alert to trichomoniasis when they have increased vaginal discharge, yellow color, odor and itching of the vulva, and seek medical attention in time to avoid delay. In daily life, pay attention to sexual hygiene and personal hygiene, and take precautions when going to and from public baths and swimming pools.