Urinary occult blood 1+ represents positive urinary occult blood. It may be caused by physiological reasons, or pathological reasons such as urinary system diseases, common glomerular diseases, urinary stones, renal tumors, etc., and non-urinary system diseases such as sepsis, epidemic hemorrhagic fever, rhabdomyolysis and so on. 1. Physiological reasons: the urine occult blood test is negative in normal people. If the normal people who usually have less exercise, exercise hematuria may occur after suddenly increasing the exercise, but it is only transient and does not need special treatment. 2. Pathologic causes: (1) Urological diseases: such as glomerular diseases, most of which are manifested by hematuria, proteinuria, hypertension and edema; in case of renal stones or ureteral stones, the friction of stones on the mucous membrane leads to mucous membrane hemorrhage and then hematuria; renal tumors also cause painless hematuria of the naked eye when invading the calyxes and pelvis of the kidneys. (2) Non-urinary diseases: sepsis, epidemic hemorrhagic fever, rhabdomyolysis, leukemia, aplastic anemia, etc. may also cause increased urinary erythrocytes and positive urinary occult blood. Positive urinary occult blood may also have other reasons, if the patient has abnormal urine test, it is recommended to timely to the regular hospital, complete the examination to clarify the cause of the disease, under the guidance of the doctor to targeted treatment or treatment.