Want to block somebody from seeing your Facebook profile? Or did you block somebody, then decide that you want them to be a part of your Facebook experience after all? Here’s how to block and unblock people on Facebook.
2. Click the gear in the upper-right corner, then choose Privacy Settings. If you are using a the mobile version of Facebook, iOS or Android app, you would select the Menu button in the upper-left corner, then choose Privacy Settings.
3. Select the Blocking link on the left pane.
4. In the Block users area, type a Name or Email, then click Block to search. A list of names will appear where you can select Block.
If you ever wish to undo a block on a person, simply click the Unblock link next to the name to let the person see your profile again, then click Confirm on the dialog that appears afterwards.