Earlier this year, singer and actress Olivia Newton-John, revealed that her breast cancer had returned more than 20 years after her original diagnosis. And in a recent interview with Australia’s 60 Minutes, she opened up about the details of her pain—and that she’s been using medical cannabis to deal with it.

Originally diagnosed with breast cancer in 1992, Newton-John said in May that her cancer had come back. Initially, the 68-year-old thought she was dealing with back pain. But it turned out that her pain was caused by breast cancer that had returned and metastasized into the bones of her lower back.

“The pain level was really the hardest thing,” she said in the interview. “I was trying to do shows and it was pretty agonizing,” she continued. She says she can walk now, but only short distances.

But, in an interview with Today this week, she says she’s not as scared this time around, partly because her daughter is an adult now. “I’ve had a wonderful life,” she said, “so I’m not as freaked out as I was when I had a young child.”

Still, treating metastatic cancer and its symptoms is serious business. In addition to undergoing photon radiation therapy, Newton-John says she has been using cannabis grown by her husband to help with the pain caused by her illness.

Click to read the entire article on Self.