Your kidneys filter waste products from your blood while retaining components your body needs — including proteins. However, some diseases and conditions can allow proteins to pass through the filters of your kidneys, causing protein in urine.

Conditions that can cause a temporary rise in the levels of protein in urine, but don't necessarily indicate kidney damage, include:

  1. Cold exposure
  2. Emotional stress
  3. Fever
  4. Heat exposure
  5. Strenuous exercise

Diseases and conditions that can cause persistently elevated levels of protein in urine, which may indicate kidney disease, include:

  1. Amyloidosis (buildup of abnormal proteins in your organs)
  2. Certain drugs
  3. Chronic kidney disease
  4. Diabetes
  5. Glomerulonephritis (inflammation in the kidney cells that filter waste from the blood)
  6. Goodpasture's syndrome (disease involving the kidneys and lungs)
  7. Heart disease
  8. Heart failure
  9. High blood pressure (hypertension)
  10. Hodgkin's lymphoma (Hodgkin's disease)
  11. IgA nephropathy (Berger's disease) (kidney inflammation resulting from a buildup of the antibody immunoglobulin A)
  12. Kidney infection
  13. Leukemia
  14. Lupus
  15. Malaria
  16. Multiple myeloma
  17. Orthostatic proteinuria (urine protein level rises when in an upright position)
  18. Pericarditis (inflammation of the sac that surrounds the heart)
  19. Preeclampsia
  20. Pregnancy
  21. Rheumatoid arthritis
  22. Sarcoidosis (development and growth of clumps of inflammatory cells in your organs)
  23. Sickle cell anemia

Causes shown here are commonly associated with this symptom. Work with your doctor or other health care professional for an accurate diagnosis.

May. 08, 2014