Questions about stomach pain & nausea

My Dad,  81 years old, was diagnosed with EC in July of 2011. He went through radiation and chemo treatments first. In January of 2012 he had an esophogectomy. Intially, for the first 2 months his recovery was quite remarkable, but in the last month he has been experiencing some problems.Most mornings he is nauseous upon waking up, so he takes something for that...makes him sleepy/groggy for hours. He complains of stomach pain after eating and asks for pain med.....makes him sleepy/groggy, so all he does is sit in his recliner and sleep. He's had his esophagus stretched twice and the bottom of his stomach balloned once. Right now, I am staying with him to make sure he is eating very small portions every few hours and taking his medicine as he should. We just got him an adjustable bed so he can sleep at the 45 degree angle.

I don't really understand "dumping syndrome" nor what it means to aspirate, but the more I read the more I realize that my Dad probably should not be living alone!!! Does anyone else have this nausea and stomach pain?

I had my esophagectomy 4 years ago.  I remember a lot of bouts with stomach pain and nauseua the first 6 months after surgery.  I often would vomit in the middle of the night or day with no ryhme or reason to why.  Some days were great, others were not.  I had my esophagus dilated 3 or 4 times an dit has been fine since.  Esophagectomy is a major surgery and it takes a while for the body to adjust.  It took me a while to learn what did and did not work for me.  I'll be honest in saying that sometimes I still experience symptoms for reasons that I can't understand.  Everyone seems to handle the surgery differently, but a lot of the effects are common.  Your Dad's GI system is still adjusting to a new way of operating.  He will definitely need some help now, but may get better and better as time passes.  I was 36 when I had the surgery, and I definitely had someone help me out the first few months, as time passed I got better and am doing great now.