It's written all over face.

It's written all over face.

: It's very evident and can easily be detected when looking at someone's face 

http://www.dailycal.org/2014/10/28/best-comfort-foods-rainy-day/

pain in the neck/butt/ass

: a bothersome annoying person / someone or something that causes trouble

ex) It's a pain in the neck having to go upstairs to make the coffee every time.

Filling out these forms is a real pain in the neck.