Final answer:
In caring for an ileostomy, the client should be instructed to meticulously cleanse the peristomal skin to avoid irritation and infection; massaging the stoma or dietary changes such as high-fiber intake are not recommended.
Step-by-step explanation:
The nurse would instruct the client with an ileostomy to cleanse the peristomal skin meticulously. This is essential to prevent skin irritation and infection due to the watery chyme that is collected in the pouch. Massaging the stoma or including high-fiber foods such as nuts can cause complications and aren't recommended post-ileostomy. It's also not advisable to limit fluid intake as hydration is important for overall health and to prevent dehydration, especially since the ileostomy can lead to a higher output of fluid.