Respiratory tract infections generally do not cause urinary occult blood 2+, and positive urinary occult blood is generally associated with urinary tract diseases, glomerular diseases, and strenuous exercise. Urine occult blood 2 + refers to the presence of red blood cells in the urine, that is, hematuria, normal people in strenuous exercise, heavy physical labor, there may be a transient hematuria; glomerulonephritis, nephrotic syndrome and other glomerular diseases, urinary tract inflammation, stones or trauma can also cause urine occult blood 2 +. Respiratory tract infections can be caused by bacteria, viruses, fungi and other pathogens, usually does not cause abnormal urine routine; but if the patient has tuberculosis, may also be secondary to urinary tract tuberculosis occult blood in urine. Therefore, when respiratory tract infection or urine occult blood positive, you need to clarify the cause under the guidance of the doctor, in order to actively treat.