If it is due to dietary factors caused by pigmenturia is generally not serious; if it is hemoglobinuria is more serious; caused by old hematuria need to be further judged according to the cause of bleeding. 1. pigmenturia: if you eat more food with pigment, drugs may lead to brown urine, this situation by adjusting the diet structure, generally will improve, not serious. 2. Hemoglobinuria: If the red blood cells are hemolyzed due to burns, crush injuries, blood transfusion reaction, etc., it may also lead to brown urine or even soy sauce color, this situation is more serious, and need active treatment. 3. hematuria: some patients with old bleeding will also appear brown urine, need to clarify the cause of bleeding to determine whether it is serious. Infection caused by the general is not serious, tumor caused hematuria is more serious. Brown urine may have other reasons, patients need to pay attention and go to the hospital in time to check, clear causes for treatment.