Certain eating disorders, such as anorexia and bulimia, can cause foul smelling urine.

In anorexia and sometimes in bulimia, the body can go into ketosis, which is a metabolic state where fat is used for fuel instead of sugar. While ketosis is normal, if it becomes excessive, it could make your urine smell bad.

Repeated vomiting, a symptom of bulimia, can also cause smelly pee.

If you believe you might have an eating disorder, talk to a therapist or medical professional who specializes in treating them.