A young woman who suffers from refractory migraines has filmed herself having a violent seizure.

21-year-old Leanne Sayers posted the video of her squirming on the floor, and it has since gone viral.

Leanne suffers these kinds of terrifying tremors up to nine times a day.

The 21-year-old's condition is still under clinical research, so she posted the video to raise awareness.

Because the condition is still being researched Leanne has a constant headache. When the headache peaks into a migraine, it's possible that she'll pass out or have another seizure.

In the video she can be seen in a vulnerable state on her living room floor in her family home in London, while being looked after by her mum, Angela.