A new trend in body art has emerged in Japan – known as the “bagel head,” The Sun reported.

The bizarre look is created by injecting saline into the forehead until it swells up, and then pressing in the center of the swollen area with a thumb.

The result gives the appearance that someone has the doughnut-shaped bread stuck to their head.

The process takes two hours to complete, but lasts just 16 to 24 hours, after which the saline is absorbed by the body and the forehead skinks to its normal size.

The strange trend was initially sparked by the photographer and journalist Keroppy in 1999.

He told Vice magazine: “I happened to meet Jerome, who was the person who pioneered saline infusions.

“We stayed in contact, then eventually I experienced saline with him in 2003 and he gave me permission to bring it to Japan.”

Keroppy – real name Ryoichi Maeda — set up a team in Tokyo to perform infusions on other people in 2007.

He said fans of the procedure enjoy “saline parties” about twice a year, and some take their “bagel head” to clubs and fetish parties.

Click for more from The Sun.