Thanks for your question on Health Care Magic.
I can understand your concern.
Yes, possibility of gas related pain is more.
He is mostly having
acute gastritis and gaseous distention of stomach which is causing such pain.
So give him
proton pump inhibitors and prokinetic drugs.
Ask him to avoid hot and spicy food. Avoid junk food.
Ask him to avoid large meals, instead take frequent small meals.
Quit
smoking and alcohol if he is having these habits.
Don't worry, he will mostly improve with all these.
If not improving then get done chest
x ray to rule out internal pathology.
Hope I have solved your query. I will be happy to help you further. Wishing good health to your husband. Thanks.