Trying to gain weight after chemo, find it hard. How do fatties do it everyday? So I'm just getting done with Chemo and I lost bout 20 pounds, slowly trying to get it back. I'm eating 2500-3000 cal a day, and man its hard. I find myself barely being able to get past 2500 without getting sick. I hate that full feeling, but when I hit 2500 cal its like running into a brick wall. Since I started eating more about a week ago I've puked 3 times.  My point is, How the fuck can fatties eat like this day in and day out and even get out of bed? I feel like shit!