does anyone have the experience of cancer pain fluctuating wildly, even when medicated with slow release OxyContin? How can one day the pain level be at 3/10 and the next off the scale? My husband diagnosed with stage 4 lung cancer September 2017...... no where near death. Still mobile, out to the pub and shops..... yes he is very tired and breathless - otherwise he looks fine! Constant fluctuating pain, debilitating. Anyone else experiencing or experienced this? I’m at my wits end. He is terrified and takes his temper out on me to the point I am thinking of leaving him. Letting his friends take care of him and arrange funeral etc, I’ll return when it’s all over. I am emotionally bankrupt.