Lyme disease is a rollercoaster for Yolanda Hadid.

One minute the 54-year-year-old is having the time of her life in sunny Tahiti, the next she is back in bed hooked up to an intravenous contraption.

The reality star shared a photo of herself receiving the latest treatment for the chronic disease on Instagram on Friday.

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Lyme is a rollercoaster: Yolanda Hadid shared a photo of herself receiving the latest treatment for the chronic disease on Instagram on Friday

'Healing a chronic disease doesn't become reality through a magic pill,' she captioned the snap of her beleagured arm.

't takes sweat, determination and persistent hard work. #LymeDiseaseAwareness #InvisibleDisability #WeMustFindACure #AffordableForAll.'

Despite her hashtags, she didn't actually share any details of the treatment to her fellow sufferers, which many followers took umbrage at.

'What is this treatment? And does it help!!? Would love to know,' one wrote.

Up and down: The mother of three posted several photos showing off her amazing bikini body as she frolicked in the crystal waters of the French Polynesian island just two weeks ago

'You are an inspiration but it would be so helpful if you could explain your treatments along with your photos. Sharing information is so important,' added another.

Lack of understanding about Lyme - a bacterial infection spread primarily by deer ticks - has long been a cause of frustration for Yolanda, especially among her fellow Real Housewives Of Beverly Hills castmates, who have each been skeptical to varying degrees.

Indeed, it is photos like the ones the former Dutch model shared just two weeks ago that were the main cause of confusion for the likes of Lisas Rinna and Vanderpump.

Belief: Lack of understanding about Lyme - a bacterial infection spread primarily by deer ticks - has long been a cause of frustration for Yolanda, especially among her fellow Real Housewives Of Beverly Hills castmates, who have each been skeptical to varying degrees

The mother of three posted several photos showing off her amazing bikini body as she frolicked in the crystal waters of the French Polynesian island.

The reality star - who separated from husband of four years David Foster last year - made two more big announcement recently: she is leaving RHOBH, and she is publishing a book about her condition.

Believe Me: My Battle With the Invisible Disability of Lyme Disease, which details her life since her 2012 diagnosis, will hit shelves in February 2017.