Yes, you can sleep with a cervical collar. However, not all types of collars are suitable to go to bed with. And it is important to consider the care instructions and use them in the right way. Otherwise, you might end up causing more damage to your back and neck. For instance, soft cervical collars are more appropriate to wear in bed. But even in such cases, you should never wear the collar to bed until it is not recommended. And while doing so, you will also need to follow some care instructions and feature specifications for the bed to make it perfect for sleeping with a collar on.