Trichomoniasis is a sexually transmitted infection (STI) caused by a parasite called Trichomonas vaginalis. It commonly affects the vagina in women and the urethra in men, though many people—especially men—don’t show symptoms.

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Symptoms in Women:

• Frothy, yellow-green vaginal discharge with a bad smell
• Vaginal itching, redness, or soreness
• Pain during urination or sex
• Discomfort in the lower abdomen (sometimes)

Symptoms in Men:

• Burning after urination or ejaculation
• Discharge from the penis
• Mild itching inside the penis
• Often no symptoms

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Diagnosis:

• Lab tests on vaginal or urethral discharge
• Rapid antigen or PCR tests (modern and accurate)

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Treatment:

• Metronidazole or tinidazole (oral antibiotics) – usually a single dose
• Both partners must be treated even if asymptomatic
• Avoid sex until treatment is completed and symptoms are gone

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Prevention:

• Use of condoms
• Regular STI screening
• Avoiding multiple sexual partners

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