<human>: Provide a brief overview of the text.

I feel like turning to to the Reddit community is basically a last resort (as great as you guys are), but I don't know what else to do. My dad has been in and out of hospitals for nearly 3 years. He has had every test performed imaginable. To this date, the most any doctor has said, is "maybe an undiscovered stomach disorder." His basic symptoms are extreme nausea, to the point where he pukes more than 20 times per day, complete lack of appetite, lethargy, and extreme sensitivity to smell, light, and sound for roughly 24-36 hours at a time. The only thing that seems to help is form of morphine, administered in a "lollipop" form. While this does not treat the condition, it seems to alleviate some pain associated with the vomiting. He has recently stopped taking the medication because he considered himself 'addicted' to the morphine and did not want to let it consume him. This means that he violently vomits and experiences stomach pain with no medication whatsoever.

He was once a captain for Delta airlines and flew internationally. When they discovered that a medication he was taking to attempt to treat the nausea was technically an anti-depressant, they fired him on the spot. He worked for Delta for over 20 years, and served 20 years in the military before that (including the first gulf war). I am proud to call him my father and seek to find help in finding a treatment/ cure to his condition. At this point, he has essentially given up and does not want any help. He feels utterly defeated and seems ready to die. I could not imagine violently puking 3-5 times a week without any end in sight. If anyone has any recommendations or has faced a similar set of symptoms, please let me know.
<bot>: My father has violent nausea episodes and is basically laid out for a day at a time for the past several years. No one know's why or how.