"Real Housewives of Beverly Hills" star Yolanda Foster opened up about her struggle with Lyme disease in a blog post published on the Bravo website last week.

Foster revealed that her condition has taken a turn for the worst, and her ability to read and write is impaired.

"Most of you know I have been battling Lyme disease for the past three years," she explained. "I wasted the first year trying to get diagnosed and spent the next two trying to find a cure. I have gone from the conventional long-term antibiotics to about every holistic protocol there is to offer. 

"Unfortunatly [sic], I was only able to get to about a 60% recovery until I relapsed in early December and have not been able to find my way back.

"I have lost the ability to read, write, or even watch TV, because I can't process information or any stimulation for that matter," she continued.

"It feels like someone came in and confiscated my brain and tied my hands behind my back to just watch and see life go by without me participating in it."

While faced a devastating situation, Foster maintained a positive outlook, and expressed faith in God to see her through her storm.

"As tired and hopeless as I feel at times, I have an undeniable spirit that will continue to fight and travel the world until I have the proper answers," she asserted. 

"I keep reminding myself that I was given this task for a greater purpose, which keeps me driven and motivated to think outside the box to make a difference not only for myself but for all my fellow Lymies suffering some form of this debilitating disease that we know so little about. 

"I am a firm believer that God often uses our deepest pain as the launching pad of our greatest calling, so even though I have not found a cure, I have faith that I will.

"I am blessed with the unwavering support of my husband, my children, and a handful of true friends, and I would like to thank you for all your sweet messages and support on social media. 

"As a human being battling this everyday invisible disability, I ask you to join me in making a kind gesture to someone every day, because everyone you meet is fighting a battle you know nothing about, so your kindness goes a long way, and together we can make a real difference in someone's day."

"RHOBH" airs Tuesdays at 9 p.m. ET on Bravo.