Before you can fix it, you have to understand why your neck seized up. In the vast majority of cases, a stiff neck is a muscular issue. According to experts, the most common culprit is muscle strain or tension caused by everyday activities.
Think about your day: Are you hunched over a computer for hours? Do you find yourself bending your neck down to look at your phone (often called "text neck")? These positions put immense pressure on the cervical spine.
However, the most common trigger is often your sleep setup. If you are using a pillow that is too high or too flat, your head is bent awkwardly for eight hours straight.
This is why searching for the right stiff neck pillow or a pillow for neck stiffness is so important for prevention.