My Apple SE watch turn black due to swimming

Hello tejinder144,

Thanks for choosing the Apple Support Communities. If we understand correctly, you are unable to power on your Apple Watch. We can understand why you'd reach out for a solution.

Here is a resource that can help.

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

Cheers!

The Watch is not waterproof, it is water-resistant. If you subject your watch to harsh chemicals its water-resistance can be defeated. And it will stop working.

About Apple Watch water resistance - Apple Support

M1 Mac mini, macOS 12.2.1; Watch, series 5 GPS/cellular, watchOS 8.4.2; iPad Pro 2nd Gen, iPadOS 15.3.1; iPhone 12 Pro, iOS 15.3.1; TV 4th Gen, tvOS 15.3; HomePods, audioOS 15.3 and Airport Express w/ Airplay 2