1) Go to your Facebook page;
2) Click the ‘Account’ tab;
3) Then select ‘Privacy Settings’;
4) You will see a new page, click on the ‘Edit list’ button;
5) When you refresh the page, you'll see a list of blocked friends and enemies;
6) Click on the ‘Unblock’ button.
When you block someone on Facebook you can ‘fix’ it within 2 minutes, unfortunately, it’s not possible in real life. Now you know how to unblock a friend on Facebook who is blocked. Take care of people that surround you, no matter, they are ‘real’ ones or the friends on Facebook.