What should be done to ensure the resident's arm is not lying on the pillow?

Repositioning the resident's arm and shoulder is essential to ensure their comfort and safety. When a resident's arm is lying on a pillow, it can lead to undue pressure on the arm, which may cause discomfort or, over time, result in pressure injuries. Proper positioning is paramount in nursing care as it promotes circulation and prevents complications.

By actively adjusting the resident's arm and shoulder, the caregiver can provide support and proper alignment, reducing the risk of strain or injury. This action also allows for better respiratory function, as an optimized position can facilitate easier breathing.

The other options do not address the potential risks involved. Leaving the arm as is would neglect the need for adequate care and could contribute to discomfort or health issues. Asking the resident to move their own arm may not be feasible, especially if they have limited mobility or awareness. Covering the arm with a blanket does not resolve the underlying issue of improper positioning, as it merely obscures the problem rather than rectifying it.