Jamie Prescott took to Facebook to share photos of her daughter Ellie's arm, which was covered in angry red burns.
She revealed the Year 10 student had suffered the second-degree burns after taking part in the 'deodorant challenge'.
In a bizarre craze, students spray aerosol cans directly on their skin and see who can last the longest.
Ms Prescott shared the images on Facebook as a warning to other parents.
'For any parents who have children, please, please sit them down and show them these pictures,' she wrote.
'These are the damaging results of something known as ‘the deodorant challenge’ which is currently doing the rounds... and literally involves spraying deodorant onto someone else for as long as possible. It’s that simple and results in severe secondary burns.'
Ms Prescott said her daughter may still require skin grafts are doing the damage.
She told Somerset Live her daughter was not aware of the consequences.
'Apparently, when they asked her to put out her arm she did it but she had no idea of the consequences and hadn’t even heard of the deodorant challenge before that point,' she said.