Peritoneal dialysis can be a treatment for kidney replacement therapy, and the lining of the abdomen can be used as the filter for dialysis. The dialysate is inserted into the abdomen through a peritoneal dialysis catheter. Conventionally, people would wait two weeks after getting a catheter insertion before starting dialysis. This period was to give enough time for the wound to heal correctly. But some studies found that chronic kidney disease patients who need to begin dialysis immediately after having a catheter insert (urgent-start peritoneal dialysis) had similar results to those who started dialysis more than two weeks after inserting the catheter (conventional-start peritoneal dialysis). Peritoneal dialysis is a significant method of kidney replacement therapy. Most patients who need dialysis right away are given hemodialysis instead of peritoneal dialysis, which means that peritoneal dialysis is not used as much as it could be. Urgent-start peritoneal dialysis is an effective and cost-effective option instead of starting conventional dialysis. There is not enough evidence to help guide the treatment, but involvement of the knowledge with this technique is required. This article overviews why urgent-start peritoneal dialysis is important and how it can be used in practice.