swell up
Intermediate (B1)neutral
To get bigger and puffy, like when you hurt yourself and the injured spot gets large and sore.
"Her ankle swelled up badly after she twisted it on the stairs."
Hear it in context

Do NOT Let This Fish Bite You! (Sea Lamprey vs. Coyote) & MORE!
Brave Wilderness Top Videos · 86:23
Swell up.

DJI OSMO NANO | Turbocharged Tiny Camera!
Potato Jet · 2:37
Is it starting to swell up?

Bold and the Beautiful - 2016 (S30 E70) FULL EPISODE 7491
The Bold and the Beautiful · 10:20
Might swell up a little bit.

Shawn Ryan: There's A Battle For Your Soul, It's Happening Right Now
The Diary Of A CEO · 48:48
like my ankles would swell up, you know,

Is hydration destroying your hair? The REAL science
Lab Muffin Beauty Science · 5:17
parts of your hair will swell up different