A UTI during pregnancy typically feels like a burning or stinging sensation when you urinate, along with a sudden, intense urge to go even when your bladder isn’t full. You may also notice pressure or cramping in your lower abdomen, cloudy or foul-smelling urine, and the feeling that you need to urinate far more often than your already-increased pregnancy frequency. The tricky part is that some of these sensations overlap with normal pregnancy changes, and in some cases, a UTI during pregnancy causes no symptoms at all.
The Main Sensations of a Pregnancy UTI
The hallmark feeling is pain during urination. Most people describe it as a sharp sting or burn that hits mid-stream or right at the end. It’s distinct from the mild discomfort some pregnant people feel from general pelvic pressure. Alongside the burning, you’ll likely feel an urgent need to get to a bathroom immediately, even if only a small amount of urine comes out.
Lower abdominal pain is common too. It can feel like cramping or a dull ache in your pelvic area or groin. Some people mistake this for round ligament pain or normal uterine stretching, but UTI-related discomfort tends to pair with the urinary symptoms rather than appearing on its own. Your urine itself may look different: cloudy, darker than usual, or tinged pink with blood. A strong, unpleasant odor is another telltale sign.
How to Tell It Apart From Normal Pregnancy Symptoms
Pregnancy already makes you urinate more often, especially in the first and third trimesters, so frequency alone isn’t a reliable indicator. The key difference is pain. Frequent urination caused by your growing uterus pressing on your bladder is painless. If peeing hurts, that’s not a normal pregnancy sensation.
Mild pelvic pressure from uterine growth can feel similar to the lower abdominal discomfort of a UTI. But a UTI adds burning urination, changes in urine appearance or smell, and that distinctive urgency where you feel like you can’t wait even a few seconds. If you’re noticing two or more of these signs together, it’s more likely an infection than pregnancy-related pressure alone.
Why Pregnancy Makes UTIs More Likely
Your body undergoes changes during pregnancy that essentially create a friendlier environment for bacteria. Rising progesterone levels relax the muscles of your ureters (the tubes connecting your kidneys to your bladder), causing them to widen. This dilation can begin as early as seven weeks and worsens as pregnancy progresses. Those relaxed, expanded ureters can hold up to 200 milliliters of urine that would normally drain quickly, giving bacteria more time to multiply.
At the same time, your bladder loses some of its muscle tone. It doesn’t empty as completely, leaving residual urine behind after each trip to the bathroom. Your urine also becomes less acidic during pregnancy, which removes one of the body’s natural defenses against bacterial growth. As your uterus grows, it physically compresses the urinary tract, further slowing urine flow. All of these factors, hormonal and mechanical, compound over the course of pregnancy and explain why UTIs are significantly more common in pregnant people.
The Silent Version: No Symptoms at All
Perhaps the most important thing to know is that a substantial number of pregnancy UTIs produce zero symptoms. This condition, called asymptomatic bacteriuria, means bacteria are multiplying in your urinary tract without causing any burning, urgency, or pain. You feel completely fine, but the infection is there. It’s typically caused by bacteria already present in your body before pregnancy that take advantage of the changes described above.
This is why prenatal providers screen for bacteria in your urine at your first prenatal appointment, even if you have no complaints. A urine culture can detect bacterial colonies that a standard urinalysis might miss. If bacteria are found at significant levels, you’ll be treated with a short course of antibiotics, usually five to seven days. Catching and treating this silent form matters because untreated bacteria in the urinary tract during pregnancy can escalate into a kidney infection or affect your pregnancy outcome.
When a UTI Moves to Your Kidneys
An untreated bladder infection can travel upward to your kidneys, causing pyelonephritis. This feels markedly different from a standard UTI. The pain shifts from your lower abdomen to your back, side, or the area just below your ribs. It’s often a deep, constant ache rather than a cramp. Fever is a key warning sign, particularly a temperature above 38°C (100.4°F). You may also experience nausea, vomiting, and chills alongside the typical urinary symptoms.
A kidney infection during pregnancy is a serious medical situation. If you’re experiencing back or flank pain combined with fever, that warrants urgent attention rather than waiting for your next scheduled appointment.
What Untreated UTIs Mean for Pregnancy
Research shows a clear link between symptomatic lower urinary tract infections and preterm birth. In one large study, pregnant people with symptomatic UTIs had a preterm birth rate of 12%, compared to 5.1% among those without infections, roughly 2.5 times the risk. This elevated risk applied to both moderate preterm birth (before 37 weeks) and early preterm birth (before 34 weeks). The connection held even after researchers accounted for other risk factors.
This is one reason providers take UTIs during pregnancy seriously and treat them promptly with antibiotics. The short course of medication addresses the infection before it can affect the pregnancy. Most UTIs resolve quickly once treatment begins, and the burning and urgency typically improve within a day or two of starting antibiotics, though it’s important to finish the full course even after symptoms fade.
Getting a Diagnosis
If you suspect a UTI, your provider will ask for a urine sample. A quick urinalysis can check for elevated white blood cells and bacteria, which point toward infection. The definitive test is a urine culture, where the sample is monitored for bacterial growth over 24 to 48 hours. A colony count at or above a specific threshold confirms the diagnosis and identifies which bacteria are causing the problem, so your provider can choose the right antibiotic.
Don’t assume that burning or urgency will resolve on its own, and don’t rely on home remedies to clear an active infection during pregnancy. The stakes are higher than outside of pregnancy, and the treatment is straightforward. A simple urine test can give you a clear answer and get you feeling better quickly.