Stomach pains

My boyfriend has been suffering frrom painful stomach cramping, bloating, constipation, and now he has a constant pressure on his rectum making it feel like he needs to pass something but there is never anything there. On top of all of that he has begun to lose weight and unable to eat anything and when he does he often feels worse than before. He has gone to the doctor numerous times and they say it could be a viral infection, or bacterial, and that he has air pockets inside his stomach, but yet he feels like there is something else going on. Any ideas what it could be?

[Jaybay]

All the symptoms you mention could be a simple matter of chronic constipation.  If he eats a lot of junk like fast food, or processed foods, it's time for a major diet change and some general nutrition education.  

Most people don't drink enough plain water either, and that alone can cause constipation or make it worse.  Keeping a glass or bottle of water at hand all day long can help you increase water intake without being big deal.  Has he tried a gentle laxative like a stool softener in the meantime?  How good is his diet and does he exercise at all?