Charlotte Nichols, who has been physically attacked, says online abuse has spurred real-life incidents.
Ms Nichols said politicians needed to lead by example and model "a good kind of debate"
BBC analysis of three million tweets aimed at MPs over a six-week period found more than 130,000, about one in 20, could be classed as toxic. "I've had someone come to my office with a knife before [and] I've had physical violence against me," she said, adding she had stepped up security at both her home and her office.She said that there was a "need to have clear laws, particularly around online harassment", but added that politicians had to lead by example.
She said there was "no excuse or no place" for such comments in political debate and they caused "significant harm".
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