Symptoms

Often, the first sign of hyperoxaluria is a kidney stone. Symptoms of a kidney stone can include:

• Severe or sudden back pain
• Pain in the area below the ribs on the back (flank) that doesn't go away
• Blood in the urine
• Frequent urge to urinate
• Pain when urinating
• Chills or fever

When to see a doctor

Kidney stones in childhood are uncommon. Kidney stones that form in children and teenagers are likely to be caused by an underlying condition, such as hyperoxaluria.

All young people with kidney stones should see a doctor for a thorough evaluation, including a test that measures oxalate in the urine. Adults with recurrent kidney stones also should be evaluated for oxalate in the urine.