A woman doused with petrol by her partner set herself alight when she lit a cigarette, police said.

The woman's partner is alleged to have deliberately thrown fuel over her during a domestic dispute at the couple's home in a suburb south of Brisbane yesterday.

The woman suffered superficial burns to her left arm and was taken to Logan Hospital.

Her partner, a 40-year-old man, has been charged with intending to maim or disfigure and is due to appear in Beenleigh Magistrates Court today.