Last week, Helena Martins, 43, was assaulted by a man as she was walking home.
In her Facebook post after the attack, she wrote: "I don't think I'll be rocking a tie in the near future.
"Today, one street away from my home, I was assaulted by a man who just went berserk at me, trying to pull my tie off.
"I've got a scratched and punched face, a sore neckline by all the tie pulling and a very bruised soul."
Martins, who has lost her hearing due to Ménière's disease, lost her cochlear earplant, which she relies on to hear, in the assault.
She wrote that homophobia and transphobia are "still very much alive", and said: "If you hear or see someone making fun with pub jokes, harassing or bullying of LGBT people, making comments while watching TV or a movie or whatever... Act. Speak out."
She added: "Some women wear ties, some men wear skirts. Get the heck over it. One thing is true: I shouldn't be punched in the face for wearing a tie."
But now hundreds of people are using the #TieForHelena hashtag in order to give her the confidence to wear a tie again.
Martins told BuzzFeed News: "The support was spontaneous ... It started with my swimming friends ... H20 magazine were the first ones to start the support and get everyone involved."
She added: "I just like to wear ties because they add a vibrant flair to my personality ... but I think most strangers think that I want to be a man or dress like a man."
"Far from it. I like to be a woman but I also like the all tie/dapper/suave thing!"
She said: "More and more we should focus on [not being] afraid of what others think or say ... and, most definitely, not being afraid of being attacked because of it. Either verbally or physically."
"Curious thing... now and again I get this 'approving' look from either a man or a woman on the tube. It's good, it's nice. Sure is a change from the many reproving looks and rolling eyes that I often get."
Martins added: "Seeing today all the photos for #TieForHelena, especially women wearing [them], blimey, don't they all look sexy?" She bought her tie last year, she told us, and it took her three days to learn how to tie it properly – but once she'd mastered it she didn't want to stop wearing ties.
While London is "a very multicultural place", she said, "people are becoming more intolerant towards others".
And she had a message for her attacker.
"Hi, I forgive you, so please let's talk about the reason why you did what you did," Marins said. "Let's talk and address that hate."
Martins is using the campaign to raise money for the charity Stonewall.
And now she's found the confidence to put her tie back on!
Alan White is a news editor for BuzzFeed News and is based in London.
Contact Alan White at firstname.lastname@example.org.
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