Some discomfort when sleeping on the implant side is common and usually normal, particularly in the weeks following the procedure. The area around the device is healing, and pressure on the wound site can cause aching or tenderness. This typically improves as healing progresses.
Once the wound has fully healed, some people still find the implant side less comfortable due to the size or position of the device, pressure from the device casing against tissue, or the way the leads sit. Trying a different sleeping position or a softer pillow placed over the device area may help. Some people find a small pillow or rolled towel between the chest and the mattress when side-sleeping provides relief.
If discomfort is significant, persistent, or getting worse rather than better after the wound has healed, mention it at your next clinic appointment. In some cases, the position of the device can be reviewed. Do not ignore ongoing pain in case it indicates an issue with the device or lead.