Blurry pics in preview WhatsApp on Iwatch

Hello thats_kishan,

Welcome to Apple Support Communities. It sounds like you're having trouble with photos showing in WhatsApp on your Apple Watch. We are happy to share information that may help.

Check for any updates for both devices:

• Update your iPhone, iPad, or iPod touch. You'll want to have a current backup prior to updating.
• Update your Apple Watch

Restart both your Apple Watch and paired iPhone: 

• Restart your iPhone
• How to restart your Apple Watch

You may also want to delete WhatsApp and reinstall it: Delete apps from your Apple Watch

Take care.