No. Bumble says that once you have blocked someone, it is not possible to unblock them. Blocking is also private, so the person you blocked is not notified that you did it.
What the block did
Bumble describes a block in two parts. It removes the person from your match list, and it prevents future contact between you.
Put together with the fact that it cannot be undone, that makes a block the most final tool the app gives you. Once you tap it, the conversation and the connection are over on Bumble for good.
If you blocked her by mistake
It happens. A thumb slips, or a man blocks in a temper at midnight and regrets it at breakfast.
Inside the app, Bumble's answer is the one above: a block cannot be reversed. So the question becomes whether you have any way to reach her outside the app.
If you swapped numbers or follow each other somewhere else, you can send her a short, normal message there. Do not make a production of it. "My thumb hit the wrong button on Bumble last night, sorry about that. Still up for that drink on Thursday?" covers it. If she was keen, that is enough. If she was not, you have lost nothing.
If you only ever spoke on Bumble, let it go. Do not make a second account to find her again. Bumble's Community Guidelines count several active accounts used for unwanted contact as spam. And a man who turns up under a new name after a block is not someone she will be glad to hear from.
Why this should change how you block
Because a block is permanent, it deserves a moment's thought first. Ten seconds of asking whether this person is a real problem, or just an annoyance, saves you from the one tap on Bumble you cannot take back.
A block is for people you are certain you never want to hear from. That means anyone who asks for money, anyone hostile or threatening, an account that is plainly fake, or an ex you do not want in your queue. Bumble's safety page tells you to block and report right away for harassment, suspicious activity, fraud or requests for money.
It is not for a woman who took a day to reply, gave you a flat answer, or teased you in a way that stung. Those are ordinary moments in a conversation. Some of them are even a sign she is interested. Blocking over them costs you conversations you might have wanted back.
What to do instead when a message stings
A lot of blocks are a reaction to one sharp line. She teases you, pushes back on a plan, or says something that lands wrong, and blocking feels like the strong response.
It rarely is. A tease is often a test of whether you can take a joke, and the man who laughs it off and keeps going looks far better than the man who vanishes. If the line was simply rude, a short, calm reply or no reply at all does the job. Save the block for the people who are a real problem, not the ones who made you wince.
Block, unmatch, or just stop replying
Three options, three different jobs.
Stop replying when a conversation has simply run out. Nothing needs to be done. It will fade on its own, and you keep the option of picking it up if she writes again.
Unmatch when you want the conversation gone. Bumble says unmatching is permanent too: it removes the chat from your view, and it cannot be undone.
Block when you want to prevent any future contact, including with someone you have never matched.
If the behaviour broke Bumble's rules, report it as well. You can block and report in the same step from the three dots in the chat.
A rule for the angry moment
The blocks men regret often start the same way. A message lands badly, you feel a flash of irritation, and you want the person off your screen right now.
Unless it is a safety issue, wait until morning. Put the phone down, go and do something else, and look again tomorrow. If you still want her gone, block her then. Often you will find you did not need a tool at all, just a night away from the conversation.
The short version
You cannot unblock anyone on Bumble, and the person is not told you blocked them. If it was a mistake and you have another way to reach her, use it once, lightly. If you do not, move on. And next time, keep the block for people you are sure about, because there is no way back from it.
Written by Matthew Stevens, Co-Founder & Head Coach. More than half a decade coaching men across the US and worldwide.
Everything here comes out of real coaching work: the approaches, dates, texts and profiles we go through with the men we coach.