There you can choose to Log out of all sessions.
Then you can safely log back in with your new password details.
To do so, go to the appropriate app store App Store for iPhones, Google Play for Android phones , search for and download the Facebook app.
Option 1: Recover Your Account From Its Profile Page If you have access to another Facebook account, for example, that of a friend or family member, and you can access your account's profile page that way because you're Facebook friends, you can use this option.