Hematuria, or blood in the urine, isn't always visible. While gross hematuria describes noticeable blood in the urine, some people are not even aware they have microscopic hematuria until they see the doctor for another symptom or condition and have their urine tested.
In the case of gross hematuria, blood in the urine may make the liquid appear pink or reddish. Visible blood in the urine is cause to see a doctor right away. Unfortunately, microscopic hematuria can only be diagnosed through the microscopic study of urine; a lab technician will notice red blood cells in your sample.
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