Here's what to do.
If you're a heavy phone user (who's not) chances are you need to clear up some storage on your phone. Sure there are lots of tricks like deleting text messages and clearing out your voicemail, but those can only get you so far.
The good news? If you use Twitter you actually have another option! According to Mashable, The latest version of the Twitter iPhone app includes settings to delete cached "media storage" and "web storage" files.
How do you do it? Click the "Me" icon located in the bottom right, Then tap the gear icon and then "data usage." You'll see the option to delete media and web storage. Clear both, and boom! You'll have more space for selfies to post to Twitter. It's basically a cycle.