Hello, there are few factors that leads to red coloured urine. Red blood cells in urine,, taking few medications, Eating some vegetables(beets blackberries) could cause this, passage of red coloured urine with pain indicates that res urine is due to red blood cess. Factors that can cause urinary blood (hematuria) include urinary tract infections, enlarged prostate, cancerous and noncancerous tumors, kidney cysts, long-distance running, and kidney or bladder stones. Kindly consult a physician near by,, for further evaluation.