4 Weeks Post-op. Implants Move to the Side When I Lay Down. Revision Needed?

Women who have breasts find that they move too --- when you lie down they go out to the sides. This can be a normal finding. Talk to your doctor

Its likely fine. I would not be thinking revision and you should make sure you communicate with your plastic surgeon. If they are in the correct position when you stand and do not fall to the side then there is little to worry about.