I am hungry constantly. The symptom is relieved for only 5-10 minutes after eating, then returns. Have been to numerous gastroenterologists and had every IBS/Crohns/Colitis related test several times over. Though the diagnoses vary, no one has been able to identify or cure this. (Stool tests are always negative for parasites; colonoscopies/endoscopies come back negative.)
The only abnormality that has shown up is a "slightly inflamed Ileum" - but I'm told that would never create this kind of severe condition. One GI Dr. listed it on some form - reluctantly - as "mild Crohn's." I said doctor, there's nothing mild about this!!
I monitor my diet VERY carefully and eat as well as I can - which must be helping on some overall level - but does not remedy the chronic hunger. I try reducing stress as much as possible and do meditation and deep breathing...which is a pleasure...but doesn't seem to affect symptoms.
Needless to say, severe fatigue/lethargy accompanies this condition.
I'm afraid your question is outside my area of expertise but I did some searching to see if I could find anything that might help you. One thing I found out is that you're not alone. When I did a Google search for chronic hunger pains, I found several forums where people were discussing very similar symptoms as well as similar difficulty in getting a diagnosis.
There is a site called WrongDiagnosis.com that lists 70 possible causes of excessive hunger. Perhaps that will give you more possibilities to discuss with your doctor. Here's the link: Excessive Hunger
Good luck to you. I hope you're able to get some help soon.
Thanks tremendously for your attention to this and for taking the time to search out relevant info. While I'm not pleased to know others have similar conditions, it is - paradoxically - comforting to know I'm not alone. I'll go now to WrongDiagnosis.com to see what I can sleuth out there. And continued gratitude for your help and good wishes! My very best to you as well. :)