Objective To summarize the skin care measures and experience of patients with long hospitalization periods, high risk of pressure injuries, and susceptibility to pressure ulcers by a case study. Methods One long-term bedridden patient with impaired active nutrient intake, diarrhea, and intraperitoneal infection who took peritoneal dialysis received pressure ulcer prevention and personalized perianal skin care interventions. Results During the 15-day hospitalization, there was no perianal skin damage during episodes of diarrhea. The patient's skin remained intact until discharge. Conclusions Timely personalized nursing interventions, such as the use of foam dressings for pressure ulcer prevention and management, should be implemented for patients at high risk of pressure injuries. For patients with diarrhea, rectal tampon insertion can keep the skin around the anus and buttocks dry, preventing stool contamination from irritating the skin and pressure ulcers and improving their comfort and satisfaction with the care.