When you block a user on Tumblr, that user can no longer message you or view your blog. To block a user, you must manually enter a Tumblr user’s name to your Ignored Users page; this presents a margin of error as you may accidentally ignore a user you didn’t want to by misspelling a username. If you find that you’ve ignored a Tumblr user you had no intention of ignoring, you can unblock that user from your Ignored Users page. Writer Bio
