"The Real Housewives of Beverly Hills" cast member Yolanda Foster tweeted from her hospital bed after surgery to treat her Lyme disease. Twitter

Dutch real housewife and former model Yolanda Foster has already begun filming the fourth season of “The Real Housewives of Beverly Hills” after undergoing surgery to treat her chronic Lyme disease.

Foster, 49, tweeted a photo of herself from her hospital bed on Friday, where she reportedly had a port in her arm removed that was likely used for routine injections and drawing blood. In a caption for the photo, Fosters wrote, “Exciting day, getting my port out, xoxo.”

Foster announced that she had been implanted with the port in December to aid in her treatment for Neuro Borrelia Lyme disease, which resulted in symptoms like chronic exhaustion and migraine headaches.

"I went from being an outspoken, multitasking social butterfly to being trapped in a mentally paralyzed cocoon. Two-and-a-half years ago, I started going to my doctors complaining about exhaustion, joint pain, insomnia, but, most importantly, my neurological malfunctions," Foster told audience members at a gala on April 9, where she was honored with the Lyme Research Alliance’s Star Light Award.

“I was so exhausted. It was even hard for me to walk from the bed to the bathroom. My migraine headaches were unbearable," Foster said in her speech. "I had this unexplainable cough that lasted for months."

She also acknowledged the support of her husband, music producer David Foster, in aiding in her recovery and in putting together “an army of the best doctors” to help treat her.

"If it wasn't for David's perseverance, I probably would not stand here today," she said. "I had become a shell of the woman I used to be. I could no longer participate in my life. I was unable to read, process information, write or do anything as simple as watch TV. I honestly stared at the ceiling for so many months that I still remember every light bulb in it.

"My children's after-school smiles at my bedside were the only bright spot in my days," she added. "It was for them and my husband that I found the strength to fight this lonely battle and continue to live and breathe in this body that once belonged to me."

After being implanted with the port, Foster said, "My husband took charge and became my private nurse.” Despite the illness, Foster has remained positive about her prognosis and said that she can’t wait to recover and get back her energy.