ELI5: Explain Like I'm 5

Cervical collar

A cervical collar is an item of medical equipment used to help support your neck. It's made to fit around your neck and upper back and has straps that you can adjust to make it comfortable. The collar helps to limit any movement in your neck that might cause pain or make an injury worse. When it's used correctly, it can help to relieve pressure from your neck and reduce stress on the muscles and bones in your neck.