Discoloration in Inspiron Display.

Currently rocking 2-in-1 Inspiron 7568. Loving it and been working great for several months. However, a blue-tinted discoloration has begun to crop up on the left hand side of the touchscreen -- mainly noticeable with white/light screens, stretching from the bottom to the top. 

Here's a list of what has/has not been done to the computer:

1. Upgraded to Windows 10 Education
2. Has not been dropped or had anythingdropped on it.
   1. A docking brick fell on the keyboard while the screen was open.
3. I'm planning on upgrading to an SSD, but this has not been done yet.
4. I barely, if ever, use the touchscreen, and I am always gentle when I do.
5. Drivers, updates, etc. are all current.
6. There are two scratches on the shell, but this came from putting it into a bag and it rubbing against a bad/broke zipper.

Basically I need to know if there is anything I am potentially missing or if this needs to just go ahead and be serviced.

Thanks,

JB