Some sexually transmitted diseases (STDs) cause foul smelling urine. Many others cause symptoms often mistaken for stinky pee at first, such as those that cause foul-smelling discharge.

Trichomoniasis
​
One of the STDs that causes smelly pee is trichomoniasis. Trichomoniasis is an infection of a protozoan parasite called Trichomonas vaginalis. The infection is usually in the vagina and/or in the urethra. This parasite kills its hosts’ cells and then consumes the pieces.
Sexually Transmitted Diseases and Stinky Pee
Both males and females can get trichomoniasis, but the symptoms are more noticeable in women. Symptoms women commonly experience include:

Itching, burning or inflammation of the cervix, vagina or urethra;
Pain or discomfort during sex;
Pain or discomfort when urinating;
Vaginal discharge that is yellowish green, frothy and smells fishy;
Foul-smelling urine;
Lower abdominal pain (which is uncommon).
Many men who have trichomoniasis will have no symptoms at all. Symptoms that men may experience include:

Irritation in the penis;
Discharge;
Irritation or burning after ejaculating or urinating.
Symptoms in men (if any) tend to go away, but this does not necessarily mean the infection has gone away.

The only treatment for trichomoniasis is a prescription antibiotic. Metronidazole is the antibiotic typically used, but your doctor may prescribe a different medication.
Can an STD Make My Urine Stinky?
If you’ve recently had unprotected sex, and you’re now experiencing stinky urine each time you head to the bathroom, you could be suffering from a sexually transmitted disease (STD).
Now, if you just had sex last night and you’re worrying like crazy because you’ve got stinky pee or a slight burning sensation, calm down. Most STD’s won’t begin exhibiting symptoms until a few days after exposure. Even then, you should definitely check with your physician and get tested if you think the main culprit behind your stinky urine is an STD.
Trichomonas
If you’re a woman and your urine smells, you may have trichomoniasis, an infection caused by Trichomonas vaginalis, a parasite. The condition nearly always occurs in the vagina, the urethra, or both. What makes this such a pernicious parasite is that it kills and consumes its host cells.

While you may think that you’ve become infected with this STD after some recent sexual activity that wasn’t protected, you may be wrong. Symptoms won’t usually begin appearing in women until 5 days after being exposed to the parasite, and may not show themselves for as long as 28 days following exposure. And when men become infected, they may not know it for years.
Symptoms
While men can also get trichomoniasis, it is rare, and women are most likely to experience its symptoms. Many of the symptoms are similar to the flu, but if you are experiencing one or more of them, and think you may have been infected through sexual intercourse, you should schedule an appointment with a physician.

Symptoms that women often experience include:
• Itching, burning or inflammation of the cervix, vagina or urethra;
• Pain or discomfort during sex;
• Pain or discomfort when urinating;
• Vaginal discharge that is a yellowish-green, cloudy or frothy, and smells fishy;
• Foul-smelling urine;
• Lower abdominal pain (which is uncommon).
If you’re a man and you think you may have gotten trichomoniasis, you may have no symptoms to speak of, but if you experience any of the following, consider scheduling a checkup with your physician.
• Irritation in the penis;
• Discharge;
• Irritation or burning after ejaculating or urinating.
Treatment
Treating trichomoniasis requires prescription antibiotics. Metronidazole is the antibiotic usually used, but your doctor may give you a different medication based on your needs and the severity of your condition.
Men have a much better time when it comes to trichomoniasis exposure. Their bodies have a good chance of expelling the parasite altogether within 14 days of exposure. Women, however, must be treated or the condition will persist.
Further Complications
Further Complications
Studies have shown that trichomoniasis may lead to other problems and complications later in life. These include:
• An increased risk of transmitting HIV;
• Women may deliver their infant prematurely, or with a low birth weight;
• Those infected have an increased risk of developing cervical cancer;
• Men with the condition have an increased risk of developing prostate cancer.
The good news is that trichomoniasis is completely preventable by engaging in safe sexual practices. Using condoms will greatly reduce your risk of getting this terrible STD.