Olivia Newton-John reveals she used marijuana to ease cancer pains

The singer opens up about her second bout with cancer in a new interview with Australia's "60 Minutes," saying that at one point she couldn't walk.
4:17 | 09/13/17

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Transcript for Olivia Newton-John reveals she used marijuana to ease cancer pains
We move on to Olivia newton-john opening up about an interview about her cancer battle revealing she had so much pain at some point she couldn't walk and sought relief with medical marijuana. ABC's Deborah Roberts here with the story. Good morning, Deborah. Reporter: Good morning. So many people touched by her raw honesty this morning. Since she was diagnosed with breast cancer back in 1992 Olivia newton-john has publicly shared her struggles and her victories and now with the battle intensifying she's revealing the hard truths about living with this ravaging disease. ??? Better shape up ??? Reporter: She wroez to fame as the original Sandra Dee. Solidifying her stardom as a singer with hits like "Let's get physical" ??? let's get physical ??? Reporter: But this morning the actress and singer making headlines for her candor about her second battle with cancer and how she's coping with the pain and keeping spirits up for herself and fellow survivors. Opening up in a new interview with Australia's "60 minutes" newton-john revealing the pain was so bad she couldn't even walk at times and that she treated it with marijuana grown by her husband John easterling telling the program, the pain level was really the hardest thing. I was trying to do shows and it was pretty agonizing. After surviving breast cancer with chemotherapy treatments and a partial mastectomy back in 1992 the 68-year-old0 singer took to Facebook in may to reveal that her cancer had returned. Writing what she thought was back pain turned out to be breast cancer that has metastasized. But after a course of radiation therapy, marijuana use and other natural wellness treatment, newton-john says she's finally on the mend. I can walk but I can't go long distances. But I'll get there because I couldn't walk at all a month or so ago. As I heal I'll be able to walk more. Ever upbeat and positive, newton-john reflecting on her life in that "60 minutes" interview. I've had and am having an amazing life so I have no complaints. We all have something we need to go through this life and this has been my challenge. The pain may be slowing her body but certainly not her spirit. Olivia just performed last Friday at her namesake art center@ and is planning to give it all this weekend in a cancer walk with all that pain and told "60 minutes," I need to get through this. I have lots to do but, of course, it's scary, I'd be lying if I said it wasn't scary but I felt that this was something I could get through. George. Honest and strong right there. Here with Dr. Jen Ashton right now. You see her mix and match a lot of different treatments for this cancer. Well, I mean first of all when you talk about metastatic cancer of any type, when you talk about metastatic breast cancer there are more people living with metastatic breast cancer today than ever before which is a good thing but it's not such a good thing. We wish that wasn't the case at all. And we had a better cure for the disease but when you talk about how you manage those symptoms, you heard her address it a little bit. It's really about the goal. You want to prevent further spread in some cases when that's not possible you do want to manage the symptoms and when you talk about cancer that's spread, those symptoms will be determined on what site of the body they spread to. When you talk about metastatic to the bone, that is excruciatingly painful. Anyone who suffered a broken bonos that pain, imagine that times a million. And for her, this homegrown marijuana really made a difference. Is that for everyone That's what's is great. We have another public figure shedding light on something that needs a lot more attention. Even though there have been studies out seven, ten years about the use of medical marijuana for treating chronic pain, we are still in our infancy so there are a lot more questions now than answers. It appears that one of the compounds, a cannabinoid targets a particular receptor in the body involved in pain and we need more research and need more research to know what strains of marijuana are best for certain pain, what dose, what root, do you inhale it, ingest it. If you want to use this like a drug, you have to really study it like a drug, no differently than something pharmaceutical. What's the most important thing for people to know about it. I think it has to be a combined approach. Not just the patient, the circle, the care givers and you support them so they can support the patient. Jen Ashton, thanks very much.

This transcript has been automatically generated and may not be 100% accurate.

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