My hamster is sick! What should I do? :(?

My hamster had that :( he had a swollen stomach so when it was drained his stomach was lined with tumours :( I know it's hard but the best thing is to put the hamster down, I had to, and my hamster was only that old and my vet (was very kind) said it would be best. Feeding her wont make it any easier because if its her stomach that swollen then the last thing that it will want to do is to eat and possibly irritate the problem :( hope this helped!