Apple Watch, Glass Panel.
Apple watch, Glass panel disintegrated, Do not know how and why?
Apple Watch, watchOS 4
Search online to locate and call contact your nearest, “local” Apple Store location to try/attempt to make an appointment to get your Watch looked at/diagnosed and options presented.
OR, failing that,
Contact Apple support via the contact support link located at the upper right hand corner of every Webpage of these Apple support communities..
OR
by installing and using the Apple Support app found in the iOS App Store.
Tap the iOS App Store link below.
https://apps.apple.com/us/app/apple-support/id1130498044
Best of Luck to You!