My dad has stage 4 prostrate cancer which was diagnosed two years ago. He recovered from a perforated bowel but because of this diagnosis wasn’t given radiotherapy or chemotherapy. 

He is now struggling to keep food down. A small meal causes pain and makes him violently sick. He is also fatigued after eating. 
on he days he doesn’t eat as much he has a cracker and half a piece of toast with tea/coffee during the day. 

im afraid to suggest to him that he has another cancer….

he thinks the PSA tests show he is doing ok . But I know this only relates to the prostate cancer. What should I suggest he does in a more proactive way without frightening him? 
The paramedic did call yesterday and said he would pass notes on to his dr but everything seems to be at a snail pace. 

any advice? 
many thanks, 

concerned daughter.