Similar to this issue (see my note there):

http://feedback.dayzgame.com/view.php?id=23290#bugnotes

My character seems to be stuck in this loop as well. Initially, I had food poisoning symptoms, healed completely, then received the "guts rumbling" message (no sick indicator), began rapidly losing water (basically stopping normal play), drank so much to avoid dehydration that I puked (repeated this step several times), much later yellow sick indicator appears, and I heal completely. Then less than an hour of gameplay later, the rumbling message reappears (no sick indicator), and I'm once again drinking for my life (repeatedly puking because digestion is slower than the dehydration rate of the disease). This is extremely frustrating, especially with the lack of information provided by the UI/Wiki.

Edit - To put this in perspective, I've spent the better part of 8 hours of gameplay dealing with this, with no apparent end in sight.