Urine occult blood 2 + years or need to timely relevant examination to find out the cause of treatment. Under normal circumstances, the urine occult blood test should be negative, if this kind of symptoms appear for a long time should be further examination to find out the cause of the disease, so as to avoid delaying the disease caused by adverse effects. There are many reasons for occult blood in urine. 1. urinary tract infection: urinary tract infection is a common cause, the patient in addition to the urine occult blood test results are abnormal, in the symptoms will also appear urinary pain, urinary frequency, fever. 2. Urinary stones: such as ureteral stones, kidney stones, etc., patients may experience paroxysmal pain in the lower back and abdomen, accompanied by urinary pain, urinary frequency, and positive hematuria test. 3. Kidney lesions: such as chronic glomerulonephritis, cryptogenic nephritis, etc., the patient will appear hematuria, proteinuria and other symptoms. If the patient’s urine occult blood test is abnormal, and a long time out of the accompanying symptoms, it is recommended to go to the hospital in a timely manner, early formal treatment, so as not to delay the condition caused by the adverse effects.