Hi Kim, my husband didn't have long term pain from his lymphoma, only for a few days early on, when his lymph nodes were getting bigger and encroaching on his gut. What type of pain are you getting?
Cool packs can be useful for inflammation, if your underarms or groin are tender (but nothing too heavy). It's probably best to ask your doctor directly, and be specific about what type of pain it is (sharp, dull, achey, generalised or specific to one small area) and how it rates on a scale of 1 to 10, and what isn't working as pain relief for you. The better you can describe your pain to the doctor, the better they can help you with it. I hope you get some relief soon. love Emily