Family doctors are a patient’s guide for all services available in the health system. Renal diseases are among the more common medical problems in GP work. The most important objective of them is to make prophylaxis, diagnosis and therapy, and in necessary cases refer patients to hospital or nephrologists. GPs ought to be very watchful because of non-specific first symptoms of renal diseases. There are additional difficulties because they take care of all age populations (children, adults and seniors) and the symptoms of pathology can be different in all these groups depending on age-specific term.