Iphone pink line on screen

Hi arjunkm,

Thanks for coming to Apple Support Communities for help today.

First, we'd advise restarting to see if this resolves the issue.

"How to restart your iPhone X, 11, 12, 13, or later

1. Press and hold either volume button and the side button until the power-off slider appears.
2. Drag the slider, then wait 30 seconds for your device to turn off. If your device is frozen or unresponsive, force restart your device.
3. To turn your device back on, press and hold the side button (on the right side of your iPhone) until you see the Apple logo."

If the line remains, your iPhone is going to require service. Please Contact Apple Support for options.

Have a fantastic day!