Dialysis is a medical treatment performed on individuals with kidney failure in order to filter and purify their blood, as the kidneys are unable to perform this function effectively. There are two main types of dialysis: hemodialysis and peritoneal dialysis. Hemodialysis involves circulating the patient's blood through a machine that filters out waste products and excess fluids, while peritoneal dialysis involves using the patient's own abdomen lining as a filter by running a special fluid through the abdomen. Dialysis is a life-saving treatment for individuals with chronic kidney disease or kidney failure, allowing them to maintain proper levels of fluids and chemicals in their body.