The answer to this question will vary depending on the type of treatment received, the type of cancer, your general health condition and the type of work to which he is devoted. So what you can do, and what not, as well as when you will need to limit the amount of work that it performs, depends on how you feel during the treatment. Some people with cancer can continue to work and continue their normal lives while they receive their treatment. Others need more rest than usual and reduce their activities. Your doctor may suggest that you limit some of your activities.