The actress, who played Sam Mitchell on the BBC soap, battled a well-publicised addiction to cocaine for a number of years which caused the complete erosion of her nasal septum.
In the most recent episode of Gogglebox, which aired on Friday (November 13), the past appearance of Westbrook's nose was referenced by Baasit Siddiqui, who asked his family and co-stars whether they would prefer to have "just one giant nostril" or "just one giant eye".
He then said that having one eye would give them the appearance of a cyclops, while having one nostril would make them look like Westbrook.
The actress has now hit out at the "derogatory" comments on Twitter, saying that she was shocked to hear them on the Channel 4 show.
"Thanks you every1 for the support u gave me about the derogatory comments @Channel4 allowed the siddiqui family too make . My manager is seeking legal advice , as trolling is not something we should take lightly [sic]," she wrote.
"And I for one am in shock that @Tanialalexander allowed that to make the edit. The show has always been a favorite of myself & my family, was a real shame that we had to witness such cruel comments on world kindness day. #BeKind #c4googlebox."
She then replied to fans who offered their support to her, saying that she "wouldn't wish the feeling" hearing the comments gave her on her worst enemy.
"Imagine you're sitting with your family and that comes on. I face the fact I have made mistakes. But being clean and that being shown could cause a relapse or suicide to somebody who does not have the support I have," she added.
"I am the first to tell a joke, but not on national tv. It's unfair when I've been a year clean and trying to mentally progress for me and my family," she told another fan.
Westbrook also pointed out that the episode had been aired on World Kindness Day, and added in a tweet directed to Channel 4 and Gogglebox producer Tania Alexander: "Bullying and trolling doesn’t just affect the person targeted it affects the ones that love them 2. Sticks& stones may break our bones but names will always hurt us."
Digital Spy has contacted Channel 4 for comment.
Gogglebox airs on Fridays at 9pm on Channel 4.
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