I agree with Dr. Teama. Protein is not normally found in the urine. When it is present, it is called proteinuria. Proteinuria may represent kidney damage or disease from a variety of causes including infections, effects of hypertensive disease or diabetes, medication side effects, inflammatory conditions, and many others.

Some people may have transient low levels of protein found in the urine, usually upon the first void in the morning or after very strenuous exercise, and this form of proteinuria is usually not dangerous.

If you or someone you know is found to have proteinuria, you should consult your primary care physician who may do some blood and urine testing to understand the degree of proteinuria present, as well as conduct a thorough history and physical examination to understand why the proteinuria is present. Your physician may refer you to a nephrologist (kidney specialist) for additional testing or treatment.

This link from the National Kidney and Urologic Diseases Information Clearinghouse provides more information about proteinuria:

http://kidney.niddk.nih.gov/kudiseases/pubs/proteinuria/