Already in ancient times, different types of illnesses were diagnosed by the smell, e.g. from the mouth. The smell of urine should not be perceptible by us. Of course, our diet, hormonal disorders, urinary tract infections, metabolic disorders or regularly taken medication in most cases change the smell. It becomes noticeable to us. A pungent, unpleasant urine odour that persists over a long period of time may or may not be a sign of illness. When should we go to the doctor? How often should I have my urine tested?