You have to be mindful when buying something and put extra thought into ensuring you don’t wrap up anything that could be detrimental to their health, or anything that could upset them. Really think over every purchase and do your research on whether it’s appropriate. There are plenty of sources of information out there, including advice from medics and cancer patients themselves, and plenty on this website. It’s good to read these, as it will give you a better and more rounded idea of what to get and what not to get.