That's tissue inflammation.
It's a REACTION to your radiotherapy.
Breaking Bad Season 2, Episode 9
For every action,
there's an equal and opposite REACTION.
The Big Bang Theory Season 2, Episode 22
My friend
is having allergic REACTION to peanuts.
The Big Bang Theory Season 1, Episode 16
in which I looked up
the REACTION rates
The Big Bang Theory Season 7, Episode 6
Leonard, what if you have
an allergic REACTION...
The Big Bang Theory Season 8, Episode 9