Whether urinary occult blood 1+ is serious usually depends on the cause of positive urinary occult blood. If it is physiological reasons such as strenuous exercise caused by positive urinary occult blood, usually not serious; if it is pathological reasons such as glomerulonephritis, urinary stones, urinary tumors and other causes of positive urinary occult blood, if the condition is less serious, the treatment effect is good, this time is not serious, if the condition is more serious, the treatment effect is not good, it will be more serious. 1. Physiological reasons: if the normal people who usually exercise less, after suddenly increasing the amount of exercise may appear exercise hematuria, positive urinary occult blood, but this is only transient, do not need special treatment, usually not serious. 2. Pathologic causes: (1) Glomerulonephritis: manifested by hematuria, proteinuria, hypertension and edema. If the pathological type is light, the treatment effect is good and the condition is relieved, it is not serious at this time; if the pathological type is heavy and the treatment effect is not good, it is more serious at this time. (2) Urinary stones: in the case of kidney stones or ureteral stones, the friction of stones on the mucous membrane leads to bleeding of the mucous membrane and positive urinary occult blood. It can be treated by means of lithotripsy drugs or surgery. If the treatment effect is good, it is not serious at this time; if the treatment effect is poor and continues to damage the kidney, it is more serious at this time. (3) Urinary tumor: renal tumor can also cause painless hematuria and positive urinary occult blood when it invades renal calyx and renal pelvis. This condition is more serious. Urine occult blood 1 + may also have other reasons, it is recommended that patients go to the regular hospital in a timely manner, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.