Nothing to worry about as they have caught it in time, a burst appendix is when you get concerned - happened to a mate of mine down here - had the front line medics in twice and was told "you have a bloated stomach" and it had burst when he got in to Treliske, so all the joys of the clean up - and then he was in ICU with pneumonia.
You aren't at that stage lcg, he'll be back on his feet and home in no time and he'll catch up with the Uni work/exam quickly; he won't be out partying for a few days so it's a good time to nail term papers etc.