Me, I have to eat 100 percent whole wheat bread sandwiches with lots of lettuce, Cheerios and a
little juice, coffee
, and plenty of water EVERY DAY. That is
how I combat constipation as an older person. So, he will need to figure out what foods do keep him regular and stick to it daily from now on, or at least a month, depending on if it recurs.
One more thing, you said this started on Wednesday. If he's like most people, he works like the devil up until Thanksgiving vacation.