What Is Trich? And what causes Trichomoniasis?

Trichomoniasis or ‘Trich’ for short is a common sexually transmitted infection caused by a tiny parasite called trichomonas vaginalis, which affects the vagina and urethra.

The condition can be difficult to diagnose because it rarely displays symptoms. And Trich symptoms that do occur can be easily confused with symptoms of other conditions.

To check your symptoms, use our interactive guide to symptoms.


Have I got Trich?

Seen predominantly in women, Trichomoniasis symptoms tend to appear between 5 and 28 days after exposure.

If you develop any of the follow symptoms, you may have Trich and should visit your GP to confirm the diagnosis. Symptoms of Trich include:

  • Soreness, inflammation and itching around the vagina. Sometimes your inner thighs also become itchy
  • A change in vaginal discharge. Your discharge may appear thicker, thinner, frothy or yellow or green in colour. You may also produce more discharge than normal and it may have an unpleasant fishy smell
  • Pain or discomfort when passing urine
  • Discomfort during sexual intercourse
  • Pain in your lower abdomen

To check whether you might have trich, please visit our guide to symptoms.

Trich Symptons

What causes Trichomoniasis?

STI Trichomoniasis is caused by a tiny parasite called trichomonas vaginalis and is most commonly spread through having unprotected sex. In some cases, the infection can also be spread through the sharing of sex toys.


Implications of Trich

Trich ImplicationsAlthough complications arising from Trichomoniasis are rare, there are a few things you should look out for.

The infection sometimes weakens the barrier of mucus in the cervix, which helps to protect women from infections in their reproductive organs. If the mucus is weakened, it can increase your risk of developing HIV. It is, therefore, very important that you practice safe sex by always using a condom.


Developing Trichomoniasis while you are pregnant may put your baby at risk of developing complications, including premature birth or low birth weight.

Treating and preventing Trich

If you think you may have trichomoniasis and are showing very obvious symptoms, you may start treatment before any test results are back.

The condition is unlikely to go away without treatment but in some rare cases may cure itself. However, if you do not seek proper trichomoniasis treatment, you risk passing the infection on to someone else.

Trich Treatment & ProventionAntibiotics and antifungals

Trichomoniasis is normally treated quickly and easily usually using an antibiotic known as metronidazole. If taken correctly, this treatment is very effective and will normally be taken twice daily, for between five and seven days.

Pregnant women who experience side effects from metronidazole may instead be prescribed clotrimazole. A clotrimazole pessary is a type of antifungal medicine that is inserted into the vagina.

Sexual Partners

It is important that you don’t have sexual intercourse while you are being treated for trichomoniasis, as you may become reinfected.

It is also important that your partner is tested, as they must be treated too. If your sexual partner is not treated, then this increases the risk of reinfection.


Like any sexually transmitted infection, the best way to prevent trichomoniasis is to practise safe sex. This means always using a condom, even when using sex toys.

If you would like to learn more about this STI or simply want to chat feel free to give our careline a call on 01656 868930 or join us on the sofa where many of these topics are discussed.