You can sleep on your side or on your back even when a cast is applied for a hairline fracture as long as the injured limb is well supported and not bearing pressure. The most important thing is to keep the limb elevated on pillows, especially in the first few weeks, to reduce swelling. Sleeping position itself does not affect bone healing, but avoiding pressure, twisting, or dangling of the cast does choose the position in which you are most comfortable while ensuring the cast is protected and supported

Where is fracture.? No Sleeping position hamper fracture healing, Just Avoid to Put pressure

No