My father has pancreas cancer( metastatic stage). He was taking all sorts of drugs starting from gemcitabine, gemzar, avastin and morphine for pain. He recently started a new treatment that combine 4 different drugs. He is feeling a lot better, he is not in pain anymore but his feet are swollen and now his hands are starting to do that. What does this mean? Should I be concerned ? Is this just an side effect or does it have a bigger meaning? And what can we do to stop them from swelling more?