Are you connected to the internet? Haha, seriously though, are you?
Presuming you have the ideal login e-mail and password (and you're linked to the web) there's a few things that might be triggering your troubles:
I Can't Log Into My Facebook
Are you obtaining an error message? If so, check the Facebook help page for descriptions and also fixes to recognized issues.
Ensure you do not have any type of expansions or antivirus programs running that are obstructing Facebook.
Have you attempted clearing the application's cache? Go to Settings > Applications > Facebook > Clear Cache. If this does not work you can try cleaning information too and also as a last resource uninstalling as well as re-installing the application totally.
Did you join your contact number? Make certain you enter the nation code too when logging in.
If the app is telling you to update your email address, this is more than likely because your email web server is identifying your Facebook emails as spam.
If you've just recently registered for Facebook you may need to validate your account first. If you've just recently transformed your password, ensure you're attempting to visit with the brand-new password and also not the old one.
If you're visiting using an internet browser, see to it you have cookies made it possible for which facebook.com is included in your checklist of safe websites.
See to it you have the most current version of the Facebook app for Android.
