Personally, he should lay off the eggs... I went through that when I ate eggs, it was like food poisoning.
This later, changed and it was later on something else.... gallstones... the pain will only get worse.. please seek medical advice as soon as possible, even if you get like a radio doctor in... then he / she can decide on what to do straight away...
A radio doctor, is just a doctor who works after hours, and who is on call.... day or night..