For security reasons your account is temporarily locked
A Facebook account is important on a personal level and a professional one. Many business owners, website owners and online marketers depend on their Facebook accounts for leads and paid advertising.
Contact Facebook and unlock your account
If you believe your Facebook is locked or disabled by mistake, you should use their 'investigation form'. Be prepared to supply unusually private information like, social security, or phone number info.
There could be a number of reasons why your account is getting the 'For security reasons your account is temporarily locked'. Some Facebook apps require access to your account's functionality to work properly. An example is the standard 'blog RSS feed' Facebook App, which requires access to account functions to work properly.
Cell phone apps may also not function properly and attempt to log into your Facebook account multiple times causing what Facebook labels as suspicious behavior.
Who knows maybe your computer has a virus or someone is trying to access your account.
Here is a list of possibilities (Help Center Search) why you're fb account is locked at 'For security reasons your account is temporarily locked'.