my watch is locked up and only displays a red lightning bolt and the time. how do I unlock?

Hi

Apple Watch displays the time and a red lightning bolt - and cannot be used for any other functions - when it has entered into Power Reserve mode, which happens automatically when the battery reaches a low charge level.

To restart your watch: press and hold the side button until you see the Apple logo.

You may need to charge your watch before it can be restarted.

Hello,

It sounds like your Apple Watch won't charge. Take a look at this article:

If your Apple Watch won't charge or it won't turn on - Apple Support

You're most welcome! 🙂