Her treatment regimen has included multiple antibiotics and ample rest.
Lavigne, 30, said trying to get a diagnosis was the worst time of her life.
“This went on and off for a month,” she said. "And I saw my doctor right away, got blood tests, got swabbed, and they didn't really know what was wrong with me."
“I started going to other doctors and, like, specifically telling them and asking, like, ‘I have Lyme disease. I know I do. Can you check me?’” she said. "Then I finally figured out, 'Find a Lyme specialist.'"
"And the thing is, when you're a specialist, you also really know the disease inside and out and you can diagnose their symptoms," Lavigne said.
After getting the diagnosis of Lyme disease, which Lavigne believes she got from a tick bite last spring, the singer was bedridden for five months in her Ontario home.
Many fans, she said, made videos and sent her letters and posters and other items to show their support.
“I sat there in my bed and I watched the videos and, like, did exactly what I'm doing now. I cried through the whole thing,” she said, laughing. “Honestly, I felt very, very loved. And it sounds silly saying it, but I really truly did feel my fans through the process.”
She took the opportunity to share encouragement to others with Lyme disease.
“There is hope. Lyme disease does exist. And you can get better,” she said.
She called this period her “second shot at life,” adding: “I really just want to go out there and truly do what I love. So I'm so excited for life after this.”