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Hydronephrosis
Urgent
Hydronephrosis is swelling of a kidney caused by urine building up because its normal drainage is blocked or impaired. It may affect one or both kidneys and can result from conditions such as kidney stones, narrowing of the urinary tract, an enlarged prostate, tumors, or urinary reflux. The condition may cause pain, urinary symptoms, infection, or reduced kidney function when severe or prolonged.
Body System
Kidneys & Urinary Tract
When to Seek Medical Attention
Hydronephrosis should be assessed because prolonged blockage of urine flow can damage kidney function. Seek prompt medical care for significant flank or abdominal pain, fever, vomiting, blood in the urine, difficulty urinating, or worsening symptoms. Urgent or emergency assessment is particularly important when obstruction is accompanied by infection, severe pain, or markedly reduced urine output.
Symptoms
3
Causes
1
Treatments
5
Diet
3
Overview
Hydronephrosis is swelling of a kidney caused by urine building up because its normal drainage is blocked or impaired. It may affect one or both kidneys and can result from conditions such as kidney stones, narrowing of the urinary tract, an enlarged prostate, tumors, or urinary reflux. The condition may cause pain, urinary symptoms, infection, or reduced kidney function when severe or prolonged.
Symptoms 3
Cloudy Urine
Urinary Incontinence
Urinary Retention
Causes 1
Hydronephrosis occurs when urine cannot drain normally from a kidney to the bladder and therefore accumulates in the kidney. Causes can include kidney stones, narrowing or blockage of the ureter or urethra, enlarged prostate, tumors, blood clots, urinary tract abnormalities, and vesicoureteral reflux. In some newborns, temporary or developmental urinary tract narrowing may cause hydronephrosis.
Hormonal Imbalance
Risk Factors
Risk depends on the cause of urinary obstruction. Kidney stones, urinary tract abnormalities, enlarged prostate, tumors, blood clots, urinary tract infections, and conditions that cause urine to flow backward toward the kidneys can increase risk. Hydronephrosis may also occur during pregnancy or in infants with developmental abnormalities of the urinary tract.
Diagnosis
Diagnosis is based on a patient's medical history,
symptoms, physical examination and, when necessary,
laboratory or imaging investigations.
Diagnosis of hydronephrosis usually involves a medical history, physical examination, and imaging to identify kidney swelling and determine its cause. Ultrasound is commonly used to visualize the kidneys and urinary tract. CT or other imaging may be needed to identify stones, tumors, or obstruction. Blood and urine tests can help assess kidney function and identify infection or other urinary abnormalities.
Prevention
Key Prevention Tips
Hydronephrosis itself is not always preventable because it can result from structural or medical conditions that cannot be avoided
Prompt evaluation of urinary symptoms, kidney stones, recurrent urinary infections, or difficulty passing urine may help identify obstruction early
Appropriate treatment of conditions that interfere with urinary flow can help protect kidney function
Prevention Guidance
Hydronephrosis itself is not always preventable because it can result from structural or medical conditions that cannot be avoided. Prompt evaluation of urinary symptoms, kidney stones, recurrent urinary infections, or difficulty passing urine may help identify obstruction early. Appropriate treatment of conditions that interfere with urinary flow can help protect kidney function.
Reminder: Prevention recommendations should be tailored to your personal health status and risk factors.
Treatment & Management 5
Detailed treatment guidance is currently being prepared.
Detailed treatment guidance is currently being prepared.
Detailed treatment guidance is currently being prepared.
Detailed treatment guidance is currently being prepared.
Detailed treatment guidance is currently being prepared.
Medical Note: The treatment information provided is intended for educational purposes only.
Always consult a qualified healthcare professional before starting,
stopping, or changing any treatment.
Diet & Nutrition 3
Recommended Foods
Water
Maintain hydration without excess intake.
Fresh Fruits
Support urinary health.
Vegetables
Provide vitamins and minerals.
Foods to Avoid
Caffeine
May worsen bladder urgency.
Alcohol
May irritate the bladder.
Carbonated Drinks
May aggravate symptoms.
Medical Nutrition Note: Diet recommendations are intended for general educational purposes and should be tailored to individual health needs by a qualified healthcare professional.
Frequently Asked Questions 5
It causes a sudden urge to urinate frequently.
Urgency, frequent urination, and nighttime urination are common.
Abnormal bladder muscle activity is a common cause.
Bladder training, medicines, and lifestyle changes may help.
Yes, pelvic floor exercises may improve symptoms.
Helpful Tip: These answers provide general medical information.
Consult your healthcare provider for advice tailored to your condition.