UTI Uncovered: What You Need to Know About Symptoms, Stages and Risk Factors.

A UTI is a very common infection of the urinary system. Such infections may involve any part of the urinary system. The most common cause of UTIs is bacteria, particularly E. coli. The symptoms include frequent urination, painful urination, and flank or lower-back pain. UTI may involve the urethra (urethritis), kidneys (pyelonephritis), or bladder (cystitis). Urine is the by-product fluid formed during the renal filtration process by the kidneys. It is formed by removing excess fluid and waste from the blood. Normally, urine flows through the urinary system without pollutants; however, UTIs arise when bacteria gets to the urinary tract.