That's tissue inflammation.
It's a REACTION to your radiotherapy.
Breaking Bad Season 2, Episode 9
My friend
is having allergic REACTION to peanuts.
The Big Bang Theory Season 1, Episode 16
Given the REACTION to my costume...
The Big Bang Theory Season 1, Episode 6
Leonard, what if you have
an allergic REACTION...
The Big Bang Theory Season 8, Episode 9