Urinary Tract Infection (UTI) - Cystitis
What is Urinary Tract Infection (UTI) - Cystitis?
A urinary tract infection, or UTI, happens when bacteria enter your urinary system and multiply. Cystitis is the medical term for a bladder infection, the most common type of UTI. Your bladder is meant to be a sterile environment, but bacteria can travel up through your urethra and attach to the bladder wall.
Most UTIs are caused by a type of bacteria called E. coli, which normally lives in your digestive tract. When these bacteria move from the bowel area to the urinary opening, they can quickly multiply in your bladder. Women get UTIs more often than men because their urethra is shorter, making it easier for bacteria to reach the bladder.
UTIs are one of the most common bacterial infections, affecting millions of people each year. While uncomfortable, most bladder infections respond well to treatment and clear up within a few days. Left untreated, a bladder infection can spread to your kidneys and become a more serious problem. Early detection helps you get treatment quickly and avoid complications.
Symptoms
Common symptoms of a urinary tract infection include:
- A strong, persistent urge to urinate
- A burning sensation when urinating
- Passing frequent, small amounts of urine
- Cloudy or strong-smelling urine
- Urine that appears red, bright pink, or cola-colored, indicating blood
- Pelvic pain or pressure, especially in the lower abdomen
- Pain or discomfort in the bladder area
- Feeling like you need to urinate immediately
Some people, especially older adults, may have a UTI without obvious symptoms. Others might only notice mild discomfort at first. If you develop fever, back pain, nausea, or vomiting, the infection may have spread to your kidneys and requires immediate medical attention.
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Causes and risk factors
Most UTIs are caused by E. coli bacteria from your digestive system entering your urinary tract. Sexual activity can push bacteria toward the bladder opening. Using certain types of birth control, like diaphragms or spermicides, can increase risk. Women face higher risk after menopause because hormonal changes affect the urinary tract lining. Holding urine for too long gives bacteria more time to multiply in your bladder.
Other risk factors include diabetes, which can weaken your immune system and make fighting infections harder. Using a catheter or having urinary tract abnormalities can trap bacteria. Pregnancy changes your urinary system and increases infection risk. Kidney stones or an enlarged prostate can block urine flow. A weakened immune system from illness or medications makes your body less able to fight off bacteria. Dehydration concentrates your urine and reduces how often you flush bacteria from your system.
How it's diagnosed
Doctors diagnose UTIs using a urine test that checks for bacteria and white blood cells. A urine nitrite test is particularly helpful because certain bacteria that cause UTIs convert nitrate in your urine to nitrite. A positive nitrite result strongly suggests a bacterial infection. The test has high accuracy for detecting gram-negative bacteria like E. coli, which cause most bladder infections.
Rite Aid offers urine testing that includes nitrite screening as part of our health panel at Quest Diagnostics locations nationwide. Getting tested when you notice symptoms helps confirm infection quickly so you can start treatment. Your doctor may also order a urine culture to identify the specific bacteria and determine which antibiotics will work best. For recurrent UTIs, additional imaging tests may be needed to check for urinary tract problems.
Treatment options
- Antibiotics prescribed by your doctor to kill the bacteria causing the infection
- Drinking plenty of water to help flush bacteria from your urinary system
- Urinating frequently and completely emptying your bladder each time
- Avoiding caffeine, alcohol, and spicy foods that can irritate your bladder
- Using a heating pad on your lower abdomen to ease discomfort
- Taking over-the-counter pain relievers for symptom relief while antibiotics work
- Wiping from front to back after using the bathroom to prevent bacteria spread
- Urinating before and after sexual activity to flush out bacteria
- Avoiding irritating feminine products like douches or powders
- Wearing breathable cotton underwear and loose-fitting clothing
- Taking probiotics to support healthy bacteria balance
- Drinking cranberry juice or taking cranberry supplements, though evidence is mixed
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Frequently asked questions
A UTI typically causes burning pain when you urinate, not just frequent urges. You may pass only small amounts of urine each time despite feeling an urgent need to go. Cloudy or foul-smelling urine, pelvic discomfort, and visible blood in urine are also signs of infection rather than just frequent urination.
While mild UTIs sometimes clear up without treatment, this is not recommended. Untreated infections can spread to your kidneys and cause serious complications. Antibiotics typically clear a bladder infection within a few days and prevent the infection from worsening or recurring.
Urine nitrite testing is highly specific, meaning a positive result strongly indicates a bacterial infection with over 90% accuracy. However, not all bacteria produce nitrite, so a negative result does not rule out infection. Your doctor may use additional urine tests to confirm diagnosis if you have symptoms but test negative for nitrite.
Women have a shorter urethra than men, making it easier for bacteria to reach the bladder. The urethral opening is also closer to the anus, where E. coli bacteria live. Hormonal changes during pregnancy and menopause also affect the urinary tract and increase infection risk in women.
Most people feel better within 1 to 2 days of starting antibiotics. You should finish the entire prescribed course even if symptoms disappear earlier. If symptoms do not improve within 2 to 3 days or if they worsen, contact your doctor as you may need a different antibiotic.
Yes, several habits can reduce your risk of repeat infections. Drink plenty of water throughout the day to flush bacteria from your system. Urinate before and after sexual activity, and wipe front to back after using the bathroom. Avoid holding urine for long periods and empty your bladder completely each time.
Sexual activity can worsen UTI symptoms and delay healing by irritating the infected area. It is best to wait until you have finished your antibiotics and symptoms have cleared. UTIs are not sexually transmitted, so you cannot pass the infection to your partner.
A bladder infection, or cystitis, affects only the lower urinary tract and causes urinary symptoms. A kidney infection occurs when bacteria travel up from the bladder to one or both kidneys. Kidney infections cause fever, back pain, nausea, and vomiting and require immediate medical treatment.
Research on cranberries shows mixed results. Cranberries contain compounds that may prevent bacteria from sticking to bladder walls. Some studies suggest cranberry products might reduce UTI risk in certain people, but they should not replace medical treatment for an active infection.
See a doctor as soon as you notice burning during urination or other UTI symptoms. Seek immediate care if you develop fever, chills, back pain, nausea, or vomiting, as these suggest a kidney infection. Also see a doctor if you have recurrent UTIs, are pregnant, or have diabetes or other health conditions.