What are some causes of protein in urine and kidney pain?

Protein in Urine. Normaly urine does not have any protein most of the time, but upto 150mgm of protein can be excreted by a normal person, that may show as trace of protein in urine test. It can be 1+or30mgm/dl, 2+or100mgm/dl, 3+or300mgm/dl, or4+or 2000mgm/dl if you have persistent protein in urine more than1+, you should see a specialist. Common causes are dehydration, nephrotic syndrome, stress, nephritis, sarcoidosis, drugs.