Urinary Tract Infection

A urinary tract infection (UTI) is an infection in any part of the urinary system. The urinary system includes the kidneys, ureters, bladder and urethra. Most infections involve the lower urinary tract — the bladder and the urethra.

Women are at greater risk of developing a UTI than are men. If an infection is limited to the bladder, it can be painful and annoying. But serious health problems can result if a UTI spreads to the kidneys.

Health care providers often treat urinary tract infections with antibiotics. You can also take steps to lower the chance of getting a UTI in the first place.

Symptoms

UTIs don't always cause symptoms. When they do, they may include:

• A strong urge to urinate that doesn't go away
• A burning feeling when urinating
• Urinating often, and passing small amounts of urine
• Urine that looks cloudy
• Urine that appears red, bright pink or cola-colored — signs of blood in the urine
• Strong-smelling urine
• Pelvic pain, in women — especially in the center of the pelvis and around the area of the pubic bone

Causes

UTIs typically occur when bacteria enter the urinary tract through the urethra and begin to spread in the bladder. The urinary system is designed to keep out bacteria. But the defenses sometimes fail. When that happens, bacteria may take hold and grow into a full-blown infection in the urinary tract.