Give a little' crowdfunding page created on Monday, she recently undertook CT and MRI scans which lead to the discovery of an 8mm aneurysm and neck injuries.
Earlier this year, Ms Grant had been working on upcoming multi-million pound Lord Of The Rings television series that is currently in production in New Zealand, and being produced by Amazon Studios.
She has since worked on at least four other productions, according to sources, as well as running her weekend stunt school before she fell ill.
It is unknown what production she was working on at the time the aneurysm was discovered. In a tearful video last night, the stuntwoman thanks those who had donated: 'Hi everyone, I just wanted to say this.
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