In this video, Dr Haresh Dodeja who is a nephrologist and in charge of kidney dialysis and kidney transplant at the Fortis Hospital, Mulund gives information about the kidney diseases and symptoms of kidney failure. The basic function of the kidney is to cleanse the blood of toxins and transform the waste into urine. That is why the kidney is also known as the filtering organ of the body. But there are also many other synthesising functions which our kidney performs such as producing the erythropoietin hormone which produces red blood cells, synthesise the final product of vitamin D which assists in calcium-phosphorus metabolism, and strengthening the bone density, maintaining the balance of salts and water which control the blood pressure of the body. There are many symptoms which can lead to kidney failure. Sometimes the kidney only passes water but fails to filter other salts and filth, which makes urine pass normally but can lead to kidney failure. When the kidney cannot pass water then this water is stored in any part of the body and leads to swelling on the face and foot and water can also be stored in the stomach cavity. As we know that the kidney produces erythropoietin which makes the blood in the body but when the kidney cannot synthesise the hormone this leads to a lack of blood in the body. Therefore, lack of blood is also a sign of kidney failure. High blood pressure is also a sign of kidney failure because the kidney helps to control the blood pressure of the body but in the case of kidney failure, the kidney is unable to control the blood pressure and this leads to high blood pressure. Loss of appetite is also a sign of kidney failure.