Facebook app on Iphone 4 isn't working?

Whenever i go to open facebook, it acts as tho its loading but then kicks me back out to my home screen. All my other apps are working fine. I can still see i have notifications but i can't actually get on there. I have sprint if that matters at all…

what should i do? There's no updates available and i've already tried turning on and off my phone.
should i delete the app and redownload? And would that mess anything up as far as my facebook if i did that?

Try updating the apps from the app store

Yes you should try uninstalling (deleting) & reinstalling the app.No, doing so will not affect your account in any way.