Thanks for the query to H.C.M. Forum.
If I were treating doctor of this severe pain
( of your husband) I would come up with these reasons.
1 The most important reason may be acute ( chronic ) gastritis with recurrent episode of pain due to various factor as radiotherapy for prostate cancer
, drugs causing gastritis, tension ( of disease ) , stress . As you mentioned that endoscopy and colonoscopy
didn't find any thing. In chronic gastritis
usually we don't find any thing except mild erosion in lesser or greater curvature of stomach.
Try raising the head of your bed about 4 inches with blocks. It might also help to avoid eating or drinking for 2 hours before your husband lie down.
To help control the stomach acid , one should not drink alcohol or drinks with caffeine in them or eat chocolates or spicy or greasy foods.
Also take some antacid ( with ingredients oxetacain in them).
As symptoms are very severe so proton pump
inhibitor may require.
2 You mentioned that there is diverticulosis
. In my opinion this is not a case of diverticulosis. The symptoms of diverticulosis are distension, flatulence & sensation of heaviness in the LOWER abdomen ( as all these symptoms are not present )
3 The most important reason of this pain is tension & anxiety . Diagnosis can be confirmed with the help of a psychiatrist .
In my opinion simultaneously consult a psychiatrist
/gastroenterologist and get their opinion.
Good luck for your husband.