my apple watch shows red coloured charging symbol and no display

Hi, kagok,

Thanks for visiting the Apple Support Communities. I'm happy to help with your Apple Watch!

When the red charging symbol appears on your Apple Watch, it means you need to charge your Apple Watch. The information in If your Apple Watch won't charge or it won't turn on - Apple Support advises that if your Apple Watch screen is blank or you see the red charging lightning bolt on the screen, you should charge your watch for at least 30 minutes: Check your battery and charge your Apple Watch - Apple Support.

Cheers.