My little cousin recently had her teeth braced and now, she complains how she can't stand the pain. Are there any ways to soothe the pressure?

Sadly, you can't do much to dull the pain. You can give pain killers if you prefer but I'd ask a doctor first before doing that. Also, try to feed your cousin only soft food during meals like soup.

I've been in her situation and I know it's painful. The best way to ease the pain is eating only soft food as much as possible. Each chew will be painful but only at the beginning :)