Why can’t I login into my Facebook account?
1-Incorrect Username or Forget Password Double check that you are enter the correct email/phone number and password. Ensure that Caps Lock is off and that you have no extra spaces.
2-Forgot your Password If you don’t remember your password try the use the “Forgot Password” option to reset it through your registered email or phone number.
3-Account Disabled or Suspended if Facebook may temporarily or the permanently disable accounts due to the policy violations. If you are believe in this happened in error to check your email for any incoming messages from Facebook or visit Facebook’s Help Center for instructions.
4-So if Hacked Account your account was compromised Facebook might block or access for security some reasons. Use of the “Hacked Account” recovery option on Facebook to regain control.