Trichomonas infection causes trichomoniasis. Trichomonas vaginalis is suitable for growth in acidic and humid environments, and is mainly transmitted directly through sexual intercourse, but can also be transmitted through public baths, tubs, toilets or contaminated instruments. Some patients are asymptomatic in the early stage of infection, mainly manifested as increased secretions, vulvar itching, burning, pain or pain during sexual intercourse, and the secretions are thin, purulent, yellowish-green, foamy, and have a foul odor. Trichomonas infection of the urethra with frequent urination, painful urination, sometimes there can be hematuria, vaginal secretion examination to find Trichomonas can be diagnosed. Trichomonas infection need to take metronidazole treatment, metronidazole should be taken after meals to reduce the gastrointestinal reaction of the drug. If you have trichomonas vaginitis, you need to treat both men and women at the same time and prohibit coitus during treatment.