What is this blue line running down my screen

[AC Question]

there is a dark blue outline and line running down my phone screen

 

[B. Diddy]

Welcome to Android Central! Which phone? Is it otherwise malfunctioning? A screenshot would be helpful: http://forums.androidcentral.com/am...ide-how-post-screenshots-android-central.html

If the line doesn't show up in the screenshot, then it's likely a problem with the screen itself.