down her side

[Gracetoon]

I read a sentence today: "Pain exploded down her side where she landed". I don't know why the author used "down her side" not "on her side"

 

[Hermione Golightly]

Because 'down her side' expresses how she felt the pain. 'On' wouldn't make much sense. 'In' might be suitable.
Please don't forget to give us a source for quotes.

 

[pops91710]

I don't know why the author used "down her side"

Because the pain was not in a small local area. Instead, it spread down her side.

 

[Simplicity]

Because the pain was not in a small local area. Instead, it spread down her side.

Is it like "along"?

 

[kentix]

Along, and specifically from the top moving to the bottom.