Dialysis is a process of removing waste products and excess fluids from the body. It is divided majorly into four types. Hemodialysis and peritoneal dialysis are majorly used in majority of cases. The principle involved in the hemodialysis and peritoneal dialysis and advantages and disadvantages are discussed below. Complications induced by the both hemodialysis and peritoneal dialysis also mentioned such as nausea, headache, leg cramps etc. Dietary guidelines for patients who are starting on hemodialysis and peritoneal dialysis.