Avril Lavigne has finally revealed the mysterious disease that compelled her to stay away from the public eye for several months. The "Hello Kitty" singer apparently suffered from a bacterial infection called Lyme disease.

The Canadian singer recently sat down with People and opened up about her almost half a year absence from the music scene due to her illness.

"I was bedridden for five months," Lavigne said, adding that she thought she was "dying" while battling Lyme disease.

"I could barely eat and when we went to the pool, I had to leave and go lie in bed. My friends asked, 'What's wrong?' I didn't know. I had no idea a bug bite could do this. I was bedridden for five months," Lavigne gushed about the disease that is more often than not spread by tick bites. 

Lavigne added that she was diagnosed of having Lyme disease after her 30th birthday trip to Las Vegas in Sept. 2014, along with husband Chad Kroeger and Nickelback.

"I felt like I couldn't breathe. I couldn't talk and I couldn't move. I thought I was dying," the singer said, according to Rolling Stone.

"There were definitely times I couldn't shower for a full week because I could barely stand. It felt like having all your life sucked out of you."

Previously, Lavigne took to Twitter to ask her fans for prayers while battling the bacterial infection. 

"I feel bad because I haven't been able to say anything to the fans to let them know why I'd been absent," she wrote at the time. "I'm torn as I'm quite private... I'm not feeling well. I'm having some health issues. So please keep me in your prayers."

Lavigne revealed that while she was recuperating from the disease in her Ontario home, she enjoyed the company of her family, spending hours watching movies and keeping up with her social media updates. 

Because of this experience, Lavigne has learned to live her life to the fullest from now on, ET Online has learned. "I really just want to enjoy life from here on out," she quipped.

Lavigne is set to release her new single "Fly" in April  in support of the 2015 Special Olympics.