What is a Urinary Tract Infection (UTI)?
A urinary tract infection (UTI) is an infection that occurs in any part of the urinary system, including the kidneys, ureters, bladder, and urethra. Most infections involve the lower urinary tract — the bladder and the urethra. UTIs are common, especially in women.
What Causes Urinary Tract Infection?
UTIs are usually caused by bacteria entering the urinary tract through the urethra and multiplying in the bladder. Common causes include:
- Escherichia coli (E. coli) bacteria, normally found in the digestive system
- Sexual activity, which can introduce bacteria into the urethra
- Poor hygiene or wiping from back to front
- Urinary retention or incomplete bladder emptying
- Use of catheters or urinary devices
- Certain contraceptives like diaphragms or spermicides
- Blockages such as kidney stones or enlarged prostate
- Weakened immune system
What Are the Symptoms?
Symptoms vary depending on the site of infection but often include:
- Frequent urge to urinate, even when little urine is passed
- Burning sensation or pain during urination
- Cloudy, dark, bloody, or strong-smelling urine
- Pelvic pain or pressure (especially in women)
- Low-grade fever or chills (more common with kidney infections)
- Fatigue or general feeling of illness
How is Urinary Tract Infection Diagnosed?
Diagnosis involves:
- Medical history and symptom discussion
- Urine sample analysis (urinalysis) to detect bacteria, blood, or pus
- Urine culture to identify the specific bacteria and guide antibiotic treatment
- Imaging tests (ultrasound or CT scan) if infections are recurrent or complicated
- Cystoscopy in rare cases to look inside the bladder
How is Urinary Tract Infection Treated?
Treatment depends on the infection’s severity and location:
- Antibiotics – The main treatment, typically lasting 3–7 days for uncomplicated infections
- Increased fluid intake – To help flush out bacteria
- Pain relievers – Such as acetaminophen or ibuprofen for discomfort
- Hospitalization and IV antibiotics – For severe or kidney infections
- Addressing underlying causes – Such as removing catheters or treating obstructions
Can Urinary Tract Infection Cause Complications?
If left untreated or recurrent, UTIs can lead to:
- Kidney infections (pyelonephritis)
- Sepsis, a life-threatening body-wide infection
- Permanent kidney damage in severe cases
- Recurrent infections causing chronic discomfort
When Should You See a Doctor?
Seek medical attention if you experience:
- Symptoms of UTI lasting more than two days
- Fever, chills, nausea, or vomiting
- Pain in your back or side
- Blood in your urine
- Frequent UTIs or infections that don’t improve with treatment