A nephrologist is a specialist in the medical problems of the kidneys.
He is an expert in the different causes of kidney disorders, their consequences and forms of treatment. He can, for example, arrange for and supervise dialysis. This treatment has to be carried out regularly if the kidneys are unable to cleanse the blood of toxins on their own.
The nephrologist also advises patients on points to watch out for in their daily lives, such as the dietary requirements needed to alleviate their illness.