Urine occult blood, urine protein weak positive can be caused by physiological reasons and pathological reasons. Physiological causes such as menstrual pollution, strenuous activities, exertion, etc.; pathological causes such as kidney stones, nephritis, etc.. 1. Physiological causes: (1) Menstrual contamination: when a woman performs urine examination, the urine specimen is inadvertently contaminated by menstruation, which may result in weakly positive urine protein and occult blood in the examination result. (2) strenuous activities, exertion: may cause a transient urinary occult blood, urine protein weak positive. 2. Pathologic causes: (1) Kidney stones: patients who have kidney stones may have pain in the kidney area, accompanied by fever and discomfort, while leukocytes can be seen in the urine, weakly positive for occult blood and urine protein. (2) Nephritis: Whether acute nephritis or chronic nephritis, weak positive urine protein and urine occult blood can be seen, and at the same time, edema, hypertension, fever and other symptoms can also be manifested. Urine occult blood, urine protein weak positive may also exist other reasons, it is recommended that patients go to the hospital in time to avoid delay.