Restart your Apple Watch

1. If your Apple Watch is charging, take it off the charger.
2. Press and hold the side button until you see the power button  in the upper-right corner of the display.
3. Tap the power button.
4. Drag the Power Off slider.
5. After your watch turns off, press and hold the side button again until you see the Apple logo.

1. If your Apple Watch is charging, take it off the charger.
2. Press and hold the side button until you see the Power Off slider.
3. Drag the Power Off slider.
4. After your watch turns off, press and hold the side button again until you see the Apple logo.

You should force restart your Apple Watch as a last resort and only if it's not responding.

Don’t force restart your Apple Watch if you're updating watchOS. After you see the Apple logo and progress wheel, leave your watch alone and on its charger until the update finishes.

To force restart your Apple Watch, press and hold both the side button and Digital Crown for at least 10 seconds, then release both buttons when you see the Apple logo.