Arnold Schwarzenegger's eldest son was injured in a skiing accident in Sun Valley, Idaho on Saturday.

Patrick Schwarzenegger, 18, suffered cuts and bruises after he took a tumble on the slopes and he shared the details of the incident in a series of posts on his Twitter.com page.

The teenager posted a picture of himself being treated by medics, strapped into a neck brace and receiving oxygen. He also posted an image of a nasty cut on his lower back, which needed stitches.

He writes, "Little ski accident today. Some bruises and stitches down back and butt. Thanks to sun valley doctors for everything."