Read Lisa Rinna's lips: Don't make fun of her plastic surgery.
The actress, 46, lashed out after a Twitter follower criticized her kisser.
"Sorry Lisa, but your lips look awful...how on Earth do you think that looks good?" the person asked.
Outraged, Rinna angrily replied: "Shame on you! How rude! If you cannot say anything nice then don't say anything at all!!"
Rinna said she usually doesn't respond to a negative comments, "but as a group, we must stop cyber bullying. It's not right."
"I'm a big girl I can handle the haters BUT what about our young people who can't and it destroys their self esteem?!!" she then added. "This must stop!"
In the past, Rinna has been outspoken about her surgery. Last year, she told the website MomLogic she looked like a "freak" because she got too much Juvederm put in her cheeks.
At Us Weekly's Hot Hollywood party last week, she said she was done talking about surgery. She told Us she didn't know why so many people seem obsessed with the topic these days.
"I couldn’t tell you [why]," she said. "I have no comment to that."