When you block someone on Facebook, they can no longer find your profile, see your posts, or contact you through the platform
Blocking is a one-way action. The person you block cannot see that you blocked them — Facebook does not send them a notification. However, they may figure it out if they search for your name and cannot find you, or if they notice they can no longer see posts you made before the block. The block remains in place until you remove it, and it applies across all of Facebook's services, including Messenger and Instagram if you use the same account.
The person you block will lose access to your profile when ready. Any messages you sent them before the block stay in their inbox, but they cannot reply to you or start new conversations. If you were friends before blocking, that friendship ends. They cannot see your photos, posts, comments, or any information on your profile — it becomes invisible to them.
Key Takeaways
- A blocked person cannot see your profile, posts, photos, or send you messages, but they are not notified that you blocked them.
- Old messages between you and the blocked person remain in their inbox, but they cannot reply or start new conversations.
- If you were friends before blocking, the friendship is removed and they cannot see your activity or send friend requests.
- You can unblock someone at any time, and they will be able to see your profile again, though you will not be friends unless you send a new request.
- Blocking is different from unfriending — unfriending lets someone still see your public posts, while blocking hides everything.
What the blocked person can and cannot do
A blocked person cannot search for your profile by name and find you in results. If they try to visit your profile directly through an old link or message, they will see a message saying the page is not available. They cannot see any of your posts, even ones you made public before the block. Comments you made on mutual friends' posts will also be hidden from them.
They cannot send you friend requests, messages, or see when you are online. If you have a shared group, they can still see the group and your posts within it — blocking does not remove you from groups. However, they cannot tag you in photos or posts, and they cannot see your activity on mutual friends' profiles.
How blocking differs from unfriending and muting
Unfriending is gentler than blocking. When you unfriend someone, they can still see your public posts and your profile (if it is set to public). They can send you messages, though you may not see them if your message requests are filtered. They can also send you a new friend request. Unfriending is useful when you want distance from someone but do not need to hide your activity completely.
Muting is the lightest option. When you mute someone, you remain friends, but their posts stop appearing in your feed. They cannot tell that you muted them. You can still see their profile if you visit it directly, and they can see your posts as normal. Muting works well when you want to reduce contact with someone without ending the friendship or blocking them.
Choose blocking when you need complete separation — for harassment, safety concerns, or situations where you do not want the person to see anything about you. Choose unfriending when you want to end the friendship but do not mind them seeing your public posts. Choose muting when you want to stay friends but reduce how often you see their content.
What happens to shared content and mutual friends
If you and the blocked person have mutual friends, those friends can still see both of your profiles and posts. The blocked person can see your comments on mutual friends' posts, but they cannot see your profile or click through to you. If you commented on a photo before blocking, your comment stays visible, but they cannot click your name to visit your profile.
Shared photos or videos you posted before the block remain on Facebook, but the blocked person cannot see them on your profile. If they are tagged in a photo with you, they can still see the photo in their own album or in a shared album, but they cannot access it through your profile.
How to unblock someone and what happens after
You can unblock someone at any time through your settings. Go to Settings and Privacy, then Settings, then Blocking. You will see a list of people you have blocked. Find the person's name and click Unblock next to their name. Facebook will ask you to confirm. Once you unblock them, they can see your profile again and search for you by name.
Unblocking does not automatically make you friends again. The friendship that existed before the block is gone. The person can send you a new friend request, and you can accept or decline it. They can also see your posts again if your profile is public, and they can message you if you allow messages from people you are not friends with.
There is no record that you blocked someone. Once you unblock them, there is no way for them to know how long the block lasted or when you removed it. They straightforward see that your profile is available again.
Blocking someone who has already blocked you
If someone blocks you first, you cannot block them in return — Facebook will not let you. You can only block people whose profiles you can see. If you suspect someone has blocked you, try searching for their name. If their profile does not appear and you cannot find them through mutual friends, they may have blocked you.
If you want to block them anyway, you can ask a mutual friend to send you a link to their profile, or you can try to access an old message thread with them. If you can reach their profile through any of these routes, you can block them even though they blocked you first. However, in most cases, if someone has blocked you, there is no practical reason to block them back.
Privacy and safety considerations when blocking
Blocking is not the same as reporting. If someone is harassing you or breaking Facebook's rules, you should report them in addition to blocking. Reporting sends the content to Facebook's safety team, while blocking only hides them from your view. You can block and report the same person.
If you are concerned about your safety, blocking alone may not be enough. Consider making your profile private, limiting who can see your posts, and not sharing your location. If someone is threatening you or stalking you, contact local law enforcement — Facebook blocking is a privacy tool, not a security tool.
Blocking is permanent until you remove it, but it is also reversible. If you block someone in anger and later regret it, you can unblock them. However, if you block someone to protect your privacy or safety, keep the block in place as long as you need it.
Frequently Asked Questions
Can someone tell if I blocked them?
Facebook does not send a notification when you block someone. However, they may figure it out if they search for your name and cannot find you, or if they notice they can no longer see your posts. There is no way to know for certain that you blocked them without trying to contact you or visit your profile.
If I block someone, do old messages disappear?
No. Messages you sent before the block stay in their inbox, and messages they sent you stay in yours. They cannot reply to old messages or start new conversations, but the history remains. If you unblock them later, they can see the old messages again.
Can a blocked person see me in group chats or shared groups?
In Facebook groups, a blocked person can still see your posts and comments within the group. Blocking does not remove you from shared groups. However, they cannot visit your profile or send you direct messages. If you want to avoid seeing them in a group, you can leave the group or mute it.
What if I block someone by accident?
You can unblock them when ready by going to Settings and Privacy, then Settings, then Blocking. Find their name and click Unblock. Once you unblock them, they can see your profile again. There is no penalty for blocking and unblocking someone.
Does blocking someone on Facebook also block them on Instagram?
If you use the same account for both platforms, blocking someone on Facebook also blocks them on Instagram. If you have separate accounts, you need to block them separately on each platform. You can manage Instagram blocks through Instagram's settings.