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🩺 Medically reviewed by the Health Decoded Guide Editorial Team
🔍 Quick Summary
Trichomoniasis is a common sexually transmitted infection (STI) caused by a tiny parasite called Trichomonas vaginalis.
Many people have no symptoms, but some develop
• abnormal vaginal discharge,
• vaginal itching, burning,
• pain during urination,
• or discomfort during sex.
Trichomoniasis is curable with the right treatment.
1️⃣ Introduction
Trichomoniasis is one of the most common curable sexually transmitted infections worldwide.
It is caused by a microscopic parasite that spreads mainly through sexual contact.
• affects both women and men
• many infected people have no symptoms
• untreated infection can spread to sexual partners
👉 A person can have trichomoniasis without knowing it.
2️⃣ How it happens
The parasite enters the genital tract during sexual contact.
After infection:
• it irritates the vaginal tissues
• inflammation develops
• abnormal discharge and discomfort may occur
👉 Even without symptoms, an infected person can still pass the infection to others.
3️⃣ Common causes and risk factors
• Sexual contact
- unprotected vaginal sex
- sexual contact with an infected partner
• Previous infection
- reinfection can happen if partners are not treated together
• Multiple sexual partners
- may increase the risk of exposure
👉 Unlike bacterial vaginosis or yeast infection, trichomoniasis is a sexually transmitted infection.
4️⃣ Common symptoms
Women may notice:
• yellow-green vaginal discharge
• frothy discharge
• unpleasant vaginal odor
• itching or irritation
• burning during urination
• pain during sex
👉 Some women develop only mild symptoms, while others notice none at all.
5️⃣ How trichomoniasis differs from BV and yeast infection
• Trichomoniasis
- yellow-green frothy discharge
- unpleasant odor
- burning and irritation
- thin gray-white discharge
- fishy smell
- little or no itching
- thick white discharge
- intense itching
- usually no strong odor
👉 Similar symptoms can have different causes, so laboratory testing may be needed.
6️⃣ Associated symptoms
• redness around the vulva
• discomfort after sex
• spotting after intercourse
• lower abdominal discomfort in some women
👉 Untreated trichomoniasis may increase the risk of acquiring other sexually transmitted infections.
7️⃣ When it becomes dangerous 🚨
• symptoms during pregnancy
• pelvic pain
• fever
• symptoms continue after treatment
• recurrent infections
👉 These may indicate:
• another sexually transmitted infection
• pelvic inflammatory disease
• pregnancy-related complications
8️⃣ Management / treatment
• prescription antibiotics are usually needed
• sexual partners should be treated together
• avoid sex until treatment has been completed
• attend follow-up if symptoms persist
👉 Treating only one partner increases the risk of becoming infected again.
9️⃣ Diagnosis
• medical history and symptom review
• vaginal swab
• urine test in some cases
• laboratory testing
👉 Because several vaginal infections can cause similar symptoms, testing helps confirm the diagnosis.
🟢 Important message
Trichomoniasis is common, curable, and treatable.
Early diagnosis helps prevent complications and reduces the risk of passing the infection to sexual partners.
👉 If you notice unusual discharge, itching, burning, or pain during sex, seek medical assessment instead of self-treating.
FAQ
• Is trichomoniasis an STI?
Yes. It is a sexually transmitted infection caused by a microscopic parasite.
• Can men have trichomoniasis?
Yes. Men often have few or no symptoms but can still spread the infection.
• Can trichomoniasis be cured?
Yes. Most infections are cured with prescription antibiotics.
• Can I become infected again?
Yes. Reinfection is common if sexual partners are not treated.
• Should my sexual partner also receive treatment?
Yes. Treating both partners helps prevent reinfection.
🔗 Related Health Topics
• Vaginal Discharge
• Bacterial Vaginosis
• Vaginal Yeast Infection
• Practicing Safe Sex and Protecting Your Reproductive Health
• Sexually Transmitted Infections (STIs)
• Pain During Sex
📚 Medical References
• World Health Organization (WHO). Sexually transmitted infections. Available from: https://www.who.int
• National Health Service (NHS). Trichomoniasis. Available from: https://www.nhs.uk
• Centers for Disease Control and Prevention (CDC). Trichomoniasis. Available from: https://www.cdc.gov
• Mayo Clinic. Trichomoniasis overview. Available from: https://www.mayoclinic.org
• National Institute for Health and Care Excellence (NICE). Sexually transmitted infection guidance. Available from: https://www.nice.org.uk
• American College of Obstetricians and Gynecologists (ACOG). Vaginitis and sexually transmitted infections. Available from: https://www.acog.org
⚠️ Medical Disclaimer
This article is for educational purposes only and does not replace professional medical advice.
If you have symptoms or concerns, please consult a qualified healthcare professional.