Find the person you want to unblock. Next to their name, click the blue button that says Unblock .
Blocking someone on Facebook removes their ability to see your profile, send you messages, or interact with you. Unblocking is the reverse process—it restores your ability to see each other’s content and communicate, as if the block never happened (though you may need to re-add them as a friend).
From the dropdown menu, select Settings & privacy , then click Settings .
Next to their name, tap the Unblock button (blue text or button).
Open Facebook Lite.
Scroll down to the Audience and visibility section. Tap Blocking .
You will see a section labeled Block users . Below it, you’ll find a list of everyone you have blocked.
Scroll down and tap Settings .