"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," the 51-year-old star of "The Real Housewives of Beverly Hills" wrote on her blog.
 

Foster opened up about her struggle with the disease, a bacterial infection spread through a tick bite.
 

"I wasted the first year trying to get diagnosed and spent the next two trying to find a cure," said Foster, who was diagnosed in 2012. "I have gone from the conventional long-term antibiotics to about every holistic protocol there is to offer. Unfortunately, I was only able to get to about a 60 percent recovery until I relapsed in early December and have not been able to find my way back."

Foster's ongoing battle with Lyme disease has gone largely unmentioned in the current season of "Real Housewives." But she was candid in her blog post.
 

"The most frustrating thing is that there is medical data on Lyme and spirochete infections going back all the way to 1908, but yet we still don't have proper diagnostic testing, a vaccine, or a cure for Lyme disease while we are living in the United States of America, the most extraordinary country in the world," Foster wrote.