Symptoms:

There may be no symptoms for many years.

Symptoms include:

• Bloody urine that starts during or soon after a respiratory infection
• Repeated episodes of dark or bloody urine
• Hand and feet swelling
• Symptoms of chronic kidney disease

Signs and tests:

IgA nephropathy usually is discovered after one or more episodes of dark or bloody urine in a person with no other symptoms of kidney disorder.

There are no specific changes seen during a physical examination. Occasionally, blood pressure may be high or swelling of the body may be present.

Tests include:

• Creatinine and blood urea nitrogen (BUN) to measure kidney function
• Urinalysis will show blood and protein in the urine
• Kidney biopsy confirms the diagnosis
• Urine immunoelectrophoresis