From colour to odour: 5 times urine gives clues about serious diseases and how to recognise them

The presence of infection in the urinary tract or kidneys, leads to urine that appears cloudy. This occurs because under these conditions, the urine contains white blood cells, bacteria and crystals, which create its cloudy appearance. The presence of strong or unpleasant odors in urine too, indicates an infection. The presence of proteinuria in urine indicates damaged kidney filters, because protein leaks through the urine when it becomes foamy. The first sign of kidney disease appears through protein loss in urine, which becomes worse when left untreated. Medical professionals need to examine kidney function immediately when patients show swelling in their hands and feet, and when their urine becomes foamy.