Dialysis generally includes hemodialysis and peritoneal dialysis, the interval of hemodialysis varies from person to person, usually once every 2 to 3 days; peritoneal dialysis needs to be performed once every 4 to 8 hours. Hemodialysis is one of the renal replacement therapies, which can be used as an adjunctive treatment for acute and chronic renal failure, drug intoxication, etc. It effectively removes toxins, metabolic wastes and water from the body, etc. The interval of hemodialysis varies from person to person, generally once every 2-3 days for 4 hours each time. For patients with acute renal failure, drug intoxication, etc., only a single to several hemodialysis treatments may be needed to remove toxic substances from the body in time, and hemodialysis can be terminated as the disease is effectively controlled and alleviated, and renal function is effectively restored. Peritoneal dialysis, on the other hand, usually requires long-term continuous dialysis and should be performed several times a day, usually 3-6 times/day, i.e., every 4-8 hours, peritoneal dialysis is required. The choice of dialysis method and the frequency of dialysis need to be decided by a regular nephrologist, and should be carried out in strict accordance with the doctor’s instructions.