Yolanda Foster's Lyme disease has been a hot topic for her season six co-stars on The Real Housewives of Beverly Hills.

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Throughout the season, Foster was faced with allegations of lying about her illness, but according to Lisa Rinna, Foster is truly suffering from the disease, and doing everything she can to fight back against the devastating symptoms.

"Being in [Yolanda's] apartment with Eileen that day was an eye-opening experience as we were given the intimate opportunity to see her day-to-day experiences," Rinna wrote in her Bravo blog earlier this week. "It was quite clear that we were sitting with a woman desperate to feel well and determined to figure out the culprits to her illness while watching her descent into darkness. My heart really went out to her in that moment as I couldn’t imagine, even for a second, having my own life do such a severe 180 due to illness."

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During Tuesday's episode, Rinna and Eileen Davidson went to visit Foster at her Los Angeles condo, where she is currently being treated for Lyme disease with a number of medications. And while others, namely Taylor Armstrong, have questioned the diagnosis, Rinna simply wants to know more about how Foster can get help.

"Yolanda’s situation affected me in a way that made me want to understand what she was going through, and I really started listening to the conversations going on around me pertaining to Yolanda, Lyme disease, and her journey to wellness," she explained

The Real Housewives of Beverly Hills season six airs Tuesdays at 9 p.m. on Bravo.