What's wrong with the reddish-brown urine?

There are many reasons why urine is reddish brown, some times due to physiological factors, and some times due to pathological factors: 1, physiological factors mainly include two aspects, such as oral administration of certain special drugs or foods, such as red pitaya, rifampicin, etc., causing the color to turn red; such as patients drinking less, peripheral blood circulation load is relatively small, kidney produced less urine, resulting in urine concentration, resulting in urine color darker. 2. Pathological factors are mainly due to the presence of urinary tract infection, tuberculosis, stones, tumors, nephritis, IgA nephropathy, etc., resulting in the formation of red blood cells in urine and color changes. Pathological factors require detailed examination and treatment.