By Mj Bergin For Dailymail.Com

Published: 16:18 EST, 19 December 2022 | Updated: 16:21 EST, 19 December 2022

Tallulah Willis shocked fans on Sunday when she posted an image of her bare back with several cupping marks.

The nine round bruises looked painful as she flashed away into a mirror selfie while exposing part of her chest.

The 28-year-old daughter of Demi Moore and Bruce Willis hinted the photo was taken when she checked into rehab in Texas eight years ago.

Cupping: Tallulah Willis showed off the bruises from cupping therapy in an Instagram post on Sunday

The bruises from the cupping therapy session began on her upper back and finished by her bottom.

She appeared to have nine in all. 

The designer — who has been sober for eight years — posted the photos on Sunday and included different selfies she had taken of herself.

She captioned the post: 'Me being hot at Texan rehab is one of my fave eras tbh.'

Casual Saturdays: The 28-year-old posted several selfies where she looked very natural and comfortable in her own skin 

The most notable photo in the set is one where Willis took a mirror selfie of her back, which was covered in bruises from cupping therapy.

Cupping is an old healing technique people use to ease pain in their bodies. A provider places cups on a person's back, legs, arms, stomach, or other parts of the body. Inside the cup, a vacuum or suction-type force pulls the skin upward.

The suction expands and breaks open tiny blood vessels under the skin, forcing the body to treat the area like an injury. The body then sends more blood to the injured area to trigger healing.

People theorize that this process clears the pores and releases toxins that have built up under the skin.

Good hair day: The actress had her hair in a wild updo for a mirror selfie

So strong: Willis celebrated eight years of sobriety in January 2022 after battling the addiction for several years

Other photos in the post also showed the actress looking very natural and comfortable in her skin.

One shot was another bathroom mirror selfie where she had her hair pulled up over the top of her head to a point and was wearing an oversized t-shirt.

She also included a photo of her outside wearing a cheetah print hat and a Garfield the cat t-shirt that said 'I Live For Saturdays.’

More selfies: The star is the daughter of actress Demi Moore and actor Bruce Willis and has been in movies herself

Willis is the sister of Scout and Rumer Willis.

She recently shared an adorable photo of her with her parents, and her dog all cuddled up together with big smiles on their faces.

Her father, Bruce, is known for his roles in films such as Die Hard, Armageddon, The Sixth Sense, and Pulp Fiction.

Family fun: Willis shared a photo of her with her parents on Instagram as they smiled and cuddled up together

He recently retired from acting when he announced that he was diagnosed with aphasia, which is the loss of ability to understand or express speech.

Willis was married to Demi Moore from 1987 to 2000 after they met at the premiere party for the 1987 film Stakeout.

The pair had three kids together, Rumer, 34, Scout, 31, and Tallulah, 28.

Published by Associated Newspapers Ltd

Part of the Daily Mail, The Mail on Sunday & Metro Media Group