@bini41 mine is chemo induced peripheral neuropathy (CIPN) The doctors know what causes it. I have hydrocodone for my back and that comes in handy too. I have morphine ER15mg to take for the shot that self injects 27 hours after chemo. It's part of my immunotherapy that stimulates my bone marrow to produce white blood cells to help my immune system fight the cancer. The next 5 or 6 days are going to be very painful. I will be short of breath, have no energy at all and very weak, be in a lot of pain and be very off balance. I'll get through it though. I have 10 treatments so far but now it's that everything is coming faster. The side effects used to not start until about the 3 or 4 day after chemo. No they start the day or 2 after. After my treatment today on walk to the car my chest felt like it does when have been exercising or doing things to use chest muscles. It just felt tight.