It certainly sounds like something is going on, if not CD then something. Judging by your age, your Dad is at the age where he should be having a routine colonoscopy anyway. But, it can be really hard to get men to go to the doctor, and especially when it concerns topics like D and vomiting. Can you have a heart to heart with him and explain to him that you want him around for a good long time and he needs to take care of himself and find out what is going on.
CD 19 years offically, 29 unofficially. 3 resections '93, '95 '97
Symptoms constantly but all tests show only minor ulcerations. Currently having multiple episodes of gastritis with no known cause.
Prednisone, 6MP,Prevacid, B12 shots, Bentyl, Xifaxan.....