Some causes of high creatinine are high blood pressure, diabetes and kidney infections, according to MedicineNet. Any condition that impairs kidney function can cause high creatinine levels. Individuals should refer questions about this or any other medical concern to a physician.
Creatinine is a waste product that occurs when creatine breaks down, explains Healthline. Creatine is a naturally occurring substance that provides energy to the body, especially the muscles. When the body metabolizes creatine, the kidneys filter creatinine from the blood and excrete it in the urine, states Mayo Clinic. Blood tests measure creatinine levels, and doctors use the results to evaluate kidney function.