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Urate Crystals

Question

We have been finding orange smudges in our son’s urine-only diapers, what is causing this? This is not in every diaper but maybe 2 or 3 in a week. Should we be worried?

Dr. Greene's Answer

Orange smudges are usually urate crystals. They are normal, soft, like tiny cubes of Jell-O — sometimes smushed, and sometimes confused with drops of blood in the diaper.

These are more common when kids are a bit dehydrated, but they can show up in healthy babies at anytime.

It just comes from having lots of urate in the urine. Sometimes orange food or some medications (such as rifampin or phenazopyridine (Pyridium)) can also be the culprit for orange smudges in the diaper.

Reviewed By:
Khanh-Van Le-Bucklin M.D. & Liat Simkhay Snyder M.D.
May 9, 2008
Published on: March 04, 2002
About the Author

Alan Greene MD

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Dr. Greene is a practicing physician, author, national and international TEDx speaker, and global health advocate. He is a graduate of Princeton University and University of California San Francisco.
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