why does my apple watch have on a white lighted line to the left of the screen

Hi leannepbern,

Thanks for using Apple Support Communities. It sounds like you have a white line on the side of the screen on your Apple Watch. We’re happy to help.

Does the line persist after restarting your Apple Watch?: How to restart your Apple Watch - Apple Support

If so, try changing your Apple Watch face to another one to see if the line is still there: Change the watch face on your Apple Watch - Apple Support

Should the issue persist, this may be a hardware issue. We suggest you contact Apple Support for service options.

Take care.