If the urine is red and cloudy, accompanied by back pain, the first thing to consider is whether there are any problems with the urinary system. First, there is no urinary tract infection, because urinary tract infection can cause cloudy urine. If there are kidney stones, bladder stones or ureteral stones, there may be dull pain in the kidney area, sometimes it feels like back pain. The second one is that the stones irritate the mucous membrane of the urinary tract, which causes red blood cells to exude and make the urine red. Therefore, the first thing to consider is the urinary tract problem.