Unlike a common cold, pyelonephritis involves bacteria attacking kidney tissue, triggering inflammation that can escalate into life-threatening complications if untreated. Without prompt intervention, the condition may lead to sepsis, impaired kidney function, or even chronic kidney failure. Symptoms such as high fever, flank pain, dysuria (painful urination), nausea, or vomiting signal the need for immediate medical attention.
Causes and Risk Factors: Know the Triggers
The primary cause of pyelonephritis is an ascending urinary tract infection. In over 80% of cases, bacteria—typically Escherichia coli—travel from the bladder through the ureters to the kidneys. Less commonly, hematogenous spread occurs when bacteria reach the kidneys via the bloodstream. Structural abnormalities in the urinary tract, such as kidney stones, congenital urinary tract anomalies, or benign prostatic hyperplasia, increase the likelihood of bacterial proliferation and infection.

Swift Treatment and Lifestyle Changes to Prevent Recurrence
Pyelonephritis demands rapid intervention, as severe cases can become life-threatening. Antibiotics, typically prescribed for 7 to 14 days, are the cornerstone of treatment. In cases of high fever or vomiting that prevent oral medication, hospitalization for intravenous antibiotics may be necessary. If a perinephric abscess forms, additional procedures like drainage may be required.
“Pyelonephritis is not just a simple urinary tract infection—it’s a potentially life-threatening condition if early symptoms are ignored,” said Dr. Hyosang Lee, a nephrology specialist at H Plus Yangji Hospital. “High-risk patients must prioritize regular checkups and diligent lifestyle management to prevent complications.”
Lim Hye Jung, HEALTH IN NEWS TEAM
press@hinews.co.kr