Yolanda Foster continues to battle Lyme disease.

Yolanda Foster Battles 'Darkness' While Fighting Lyme Disease, Will She Return To 'RHOBH?'

As the Real Housewives of Beverly Hills star continues to struggle with the illness, she's kept fans in the loop with her latest treatments on Instagram. In her most recent update, Foster shared a new photo on Instagram.

"Being Positive in a Negative situation isn't naive, it's leadership on a mission...... #DeterminedToFindACure #AffordableForAll #ChronicLymeDiseaseAwareness," Foster wrote in the caption of the photo.

Yolanda Foster Gives Herself A 'Cheat Day' While Fighting Lyme Disease

A photo posted by YOLANDA (@yolandahfoster) on Jun 10, 2015 at 5:10pm PDT

After being diagnosed with Lyme disease in 2012, Foster suffered a relapse at the end of last year, which left her unable to read, write or watch television. It also prevented her from completing filming on The Real Housewives of Beverly Hills' reunion, and now, her return to the show is questionable.

If her husband, David Foster, has it his way, however, Yolanda will leave the show and focus on her recovery.

“David has told Yolanda there is just no way she can return to the show because her condition is just getting worse. The Lyme disease is just ravaging her, and traveling for the international medical treatments is taking a toll,” a source told Radar Online“Yolanda is extremely weak, and her memory is suffering. David is just being protective because he doesn’t want any of the ladies to use her illness against her, as he knows those women are vicious.”

The source added, “It will break Yolanda’s heart if she can’t be on 'RHOBH' because she wants to use the platform to raise awareness about the illness.”