Normal blood creatinine proteinuria can be caused by physiological factors, urinary tract infections and kidney diseases. 1. Physiological factors: such as strenuous exercise or dietary factors, may lead to the presence of protein in the urine, but the blood creatinine is normal, after eliminating the causative factors can usually return to normal on their own, do not need to be treated. 2. Urinary tract infections: for example, cystitis, may be related to poor hygiene, infection aggravation will make the presence of protein in the urine, but the test found that the blood creatinine is relatively normal, accompanied by frequent urination, urinary urgency, urinary pain and other symptoms. 3. Kidney disease: such as mild glomerulonephritis, nephrotic syndrome, in the early stages of the disease blood creatinine is normal, but the presence of protein in the urine, may also be accompanied by lower limbs and eyelid swelling and other symptoms. Blood creatinine normal proteinuria, but also for other reasons, it is recommended that patients with proteinuria, timely regular hospital visits, under the guidance of physicians to clarify the cause of the disease, targeted treatment.