More details please, vague references to specific problems make it hard to offer relevant, pertinent suggestions.
-- Phone model? What version of Android is it running?
-- Is this a matter where you can't access just the Security options or is this an issue when you try to access options in your Settings menu?
-- What have you already tried to fix this issue? This might reduce a lot of just repetitive replies. Have you at least tried restarting your phone? That's a basic thing to try when it comes to a lot of one-off glitches. Which leads to an additional query...
-- How long has this been a problem? Just recently or a long-standing one, and can you recall anything happening that might be coincide with when it did become evident (i.e. system upgrade, a security update, installing an app, etc.)