"Real Housewife" ​Yolanda Foster: I've lost ability to read and write

Yolanda Foster attends the Selma and the Legends Who Paved the Way gala at Bacara Resort on Dec. 6, 2014, in Goleta, California.

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Yolanda Foster opens up about the toll Lyme disease has had on her in a new blog post, revealing that she's lost the ability to read and write.

Diagnosed with Lyme disease in 2012, the 51-year-old star of "The Real Housewives of Beverly Hills" apologized to fans for not writing earlier because "unfortunately I have lost the ability to do so in an intelligent matter at this time."

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

Foster says she relapsed in December and has "not been able to find my way back."

She thanked her family, friends and fans for their support, adding "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."

Foster has also documented some of her health issues on Instagram:

Foster has been on the "The Real Housewives of Beverly Hills" since 2012.

Go here to read her entire blog post.