Marnie Simpson says son has 'severe' skull condition

Marnie Simpson has opened up about her son's skull condition, which causes his head to be 'flattened on one side'.

Baby Oax, who is four months old, suffers from a condition called plagiocephaly - which affects the skull - and torticollis, which is a problem involving the muscles of the neck that causes the head to tilt down.

Explaining how the conditions affect Oax specifically, Marnie, 30, took to Instagram to explain: "So basically Oax has torticollis from his position in the womb which has left him unable to move his head left, this is hopefully improving with his physio appointments with the osteopath.

"However this condition has left him with plagiocephaly (the head is flattened on one side, causing it to look asymmetrical, this can cause the ears to be misaligned and the head looks like a parallelogram when seen from above, sometimes the forehead and face may bulge a little on the flat side) as you can see on Oax’s graph he’s on the severe side which even shocked me."

Alongside the post, Marnie shared a photo of Oax as well as a graph which represents the different levels of severity of the condition.

Marnie went on to explain that Oax will soon be getting his helmet fitted and that the little one's skull should progress to the 'yellow/green zone' of the graph.

"I’m being open about his process as I know so many parents don’t even know about this issue and it gets left," she continued.

"He’s had his measurements taken yesterday by @technologyinmotion and in 2 weeks he’ll get his helmet fitted. This company was recommended to me by various different places I’ve heard there the best Oax’s head should end up in the yellow/green zone which is fab, treatment should start between 4-6 months while the skulls are soft any questions let me know I’m happy to answer! [sic]"

Other mums were super grateful to Marnie for sharing her story and Oax's experience, explaining they'd never heard of the condition.

One person wrote: "I honestly didn't know this was a thing. Thank u for sharing marns."

Marnie and fiancé Casey Johnson welcomed Oax back in May. At the time, Marnie posted a black and white picture of her baby boy's hands and said in the caption: "Baby boy has arrived safe and sound. We’re completely in awe, our family is complete."

The couple are already parents to two-year-old Rox.