'Real Housewives' Star Posts Blog About Her Struggles With Lyme Disease

Yolanda Foster's three-year battle with the disease may have taken a turn for the worse.
2:05 | 01/20/15

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Transcript for 'Real Housewives' Star Posts Blog About Her Struggles With Lyme Disease
that real housewife star battling lime disease. She's opening up about her struggling hoping to find a cure and Abbie Boudreau has her story. Reporter: A picture perfect persona. Character isn't what you have, it's who you are. Reporter: But behind the star-studded scenes on TV, a much different reality for the struggling real housewives of Beverly hills star Yolanda foster whose three-year-long battle with Lyme disease has been painfully chronicled on the show. It went in my brain and I was losing brain function. Reporter: The former Dutch model and wife to David foster now opening up in a recent blog saying her debilitating illness has taken a turn for the worse. The 51-year-old writing "I relapsed in early disease and have not been able to find my way back. I have lost the ability to read, write or even watch TV." Clearly frustrated, Yolanda explaining, "We still don't have proper diagnostic testing, a vaccine or a cure for Lyme disease. Something doesn't add up here." In 2014 we met her at her malibu mansion. I get emotional just thinking about it. Ju just, you know, how am I ever going to get out of this. Reporter: Each year 30,000 people in the U.S. Are diagnosed with Lyme disease. A bacterial infection transmitted by ticks. After a bite, it can enter the bloodstream attacking the skin, joints and nervous system. It can be difficult to diagnose and the signs and symptoms can be pretty diverse and the treatment and management of Lyme disease is medically controversial. Reporter: And after feeling more like herself while filming this season of "Housewives" her recent relapse has her vowing to find a cure telling Andy Cohen on "Watch what happens live" it's her mission to help others. There's millions other suffering just like I am. Reporter: Abbie Boudreau, ABC news, Los Angeles. We're happy she's doing so

This transcript has been automatically generated and may not be 100% accurate.

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