Bella Hadid rocked the runway as a Victoria's Secret angel last night at Victoria's Secret Fashion Show - but according to body language expert Judi James, the outing may have 'cost her a lot' as she recovers from a recent stint in the hospital. 

The model, 29, made her appearance just weeks after her mom, Yolanda Hadid, posted a series of heartbreaking pictures of the star, 29, in the hospital.

It was later revealed exclusively by Daily Mail that she spent one month undergoing invasive treatments at Germany's St George Hospital as she battles chronic neurological Lyme disease.

The photos showed Bella as she suffered through a myriad of treatments, including what is suspected to be Chelation therapy, which removes heavy metals from the body. 

One particularly distressing picture saw Bella crouched down in an elevator, appearing quite weak. 

However, the professional model was able to turn things around and present a stunning look for the Victoria's Secret Fashion Show.

She wore a silky, red lace set with a matching garter to open the show, and then went down the runway again in an outfit change that had her in a bedazzled, silver lingerie set.

The famous 'angel' wings that she wore weighed nearly 50 pounds, she later wrote on Instagram, and were adorned with white roses.

However, as she walked down the runway wearing the wings, some fans were seemingly alarmed, commenting that it looked like she was almost about to 'faint' at one point.

The model didn't appear to be her upbeat, bouncy self as she strutted down the runway for the second time that night, observers pointed out. 

And per Judi James, fans might be on to something here.  

'Bella's illness is known to produce symptoms of fatigue and chronic pain so, although she looks strikingly beautiful on this runway appearance, her subtler body language cues hint that the outing might have cost her a lot in terms of resolve and effort,' James told Daily Mail exclusively.

'Her walk looks a little tentative with some rather careful hip and torso placements,' James continued.

'Her hands hold her upper thighs in a suggestion of vulnerability, but it's the way her head is slightly lowered and then drops lower still that suggests there might be a brave amount of effort being put into this outing,' she shared.

'Her eyes are lowered too in a suggestion of a lack of peak-style energy here.'

However, the body language expert noted that her stance became a lot different as she finished her walk.

'As she reaches the end of the runway though it looks like muscle memory kicks in as her static poses are pitch-perfect,' James told Daily Mail.

'We can see her much more meaningful, camera-seeking sultry facial expression re-appear here as she arches her back showing more flexibility in her torso again,' she explained. 

When she was at the end of the runway, Bella blew a kiss and waved to the audience, which James says was a meaningful move. 

'Bella blows a kiss, and it looks like a signal to the fans to imply all is well and even some thanks for their love and support,' she said.

'Then comes the much sweeter signal of vulnerability as she raises both hands in what is called a "baby wave," a clutching and unclutching of the fingers that is less about her sensual outfit and more about a cutely touching tie-sign of recognition to her audience,' James explained. 

While James believes that Bella's trip down the runway may have been quite taxing, some fans couldn't help notice the same.

After a video taken by Vogue was posted to TikTok on Wednesday night, many fans left messages of concern for the model.

'She's stunning, but she looks so sad. Maybe because of her illness… hope she recovers soon and gets back better than ever!' one person wrote.

Someone else typed, 'She kept looking down during this. Might've been a shoe issue. still gorgeous though.'

'She's clearly in pain or something,' another seconded.

Others, however, defended the star and the heavy wings.

'She was just hospitalized. Cut her slack. She killed the walk in the red outfit,' one user wrote.

Another wrote, 'She was sick y'all and we don't know if she's 100% better plus those wings weigh 50lbs+ in heels? Yea I would probably walk the same lol.'

Just one month ago, Bella was in the hospital on the outskirts of Munich, where they have a Lyme Specialized Center.

It is focused on using whole body hyperthermia treatment to kill the bacteria – Borrelia burgdorferi – responsible for the tick-borne disease. The clinic claims to have 'successfully treated more than 800 patients with chronic Lyme disease'. 

The treatment slowly raises a patient's body temperature to 107°F and then maintains it for two to three hours while they're sedated.

Bella is said to have had two rounds, one week apart, according to an insider, as well as two weeks of antibiotics, Chelation therapy (the process of removing heavy metals from the body) and multiple peptide infusions. 

Pictures shared by Yolanda and Bella also show her with what appears to be an apheresis catheter in her neck which is used for the removal of specific blood components.

Her stay at the clinic – which also offers laser therapy, detox footbaths, colon cleansing and controversial ozone therapy (the process of administering ozone gas 'intravenous and/or rectally') as a treatment for Lyme disease – was reportedly suggested by her mother, and would have cost upwards of $100,000.