A young Tasmanian woman whose boyfriend allegedly threw fuel on her and set her alight is responding to medical treatment, relatives say.

Nicole Evans, 20, was airlifted to Melbourne in a critical condition on Tuesday and will require extensive treatment.

She suffered burns to more than 50 percent of her body and remains in an induced coma at The Alfred Hospital.

Matthew John Davey, 34, is accused of dousing his girlfriend with fuel and setting her alight. (Facebook).

A friend of Ms Evans, Leslie Chambers, reported yesterday she is slowly recovering.

Posting on a Go Fund Me page set up for Ms Evans on Sunday, Leslie Chambers said: "I am pleased to be able to report - having just been speaking with Nicole 's mother - that she is responding to sound and moving her limbs."

"Her eyes are also moving under her eyelids. Her immediate family are relieved to witness this progress."

A fundraising campaign has been set up to help Tasmanian woman Nicole Evans, 20, who suffered horrific burns to more than half her body. (Facebook).

A hospital spokeswoman said on Sunday night she was still in a critical but stable condition, reports the Daily Mail.

The fundraising page has raised almost $22,000 to date.

Police alleged Matthew John Davey, 34, doused her with an accelerant and set her alight in a backyard shed.

He has been charged with causing grievous bodily harm and other matters.