Hi. Yes I have been reading up on it and you are right, it could mean many things. It could be a symptom of end stage cancer, it could be from the treatments, or anything. I will be calling the doctor first thing in the morning tomorrow. He just told me that he has a friend getting him some rso oil to try. It may help with the vomiting but I don't think it will help with swollen feet. Will keep you posted.