"become uncomfortable" is a correct and usable phrase in written English.
It is often used to describe a change in feeling or state of being. Example: As she spoke, I started to become uncomfortable.
Has Prendergast's advocacy sometimes become uncomfortable?
That's why they become uncomfortable around strangers.
He said he had become uncomfortable there.
This had become uncomfortable for City.
"When you make a strategic shift, professionals can become uncomfortable".
More recently, however, I've become uncomfortable with our conventional wisdom.
The able-bodied, if they become uncomfortable, can shift their seating position.
"Allow yourself to become uncomfortable" and other pearls of wisdom from 2017 graduates.
Please call this number if you become uncomfortable in any situation.
They, in turn, threatened that if I refused to leave, things would become "uncomfortable" for me.
At first, it is uncomfortable for you, but then it will become uncomfortable for your opponent".
