Hi All, I just Googled "left side ache" b/c I have it off and on for years and then found this site. I haven't had it as much lately and, after reading your comments, I think I know why. Almost 3 years ago, I had the ELISA blood test done because I was ALWAYS sick - either starting to get a sinus infection, bronchitis or pneumonia or just getting over one. The purpose of the test is to check for delayed immune response allergies. Basically, that means that it affects you further down the pipe; not usually immediately after you eat or touch what your body is intolerant to.
The ELISA test results told me that I was allergic to eggs and bananas (which I was eating everyday), pineapple, asparagus and a few other minor ones. I immediately started avoiding all the high reaction foods and within a couple of weeks was feeling amazingly improved and the cycle of repiratory illnesses subsided and then stopped. I didn't know exactly how all the different foods affected me, but over the years as I've accidently eaten some of them I've found most of them out. For me, I experience IBS symptoms when I eat oats. For a while I was eating Cheerios almost everyday because I had been told to avoid eggs at all costs (oats was a "minor" allergy for me so I had overlooked it). Once I got the major ones out of my diet I realized I was still feeling the IBS symptoms (which my naturopath has associated with a lot of food allergies), so we went through my list again and looked at the remaining ones. I switched from multi-grain breads to only whole wheat and threw out the Cheerios. Every once in a while, though, I get a major craving for them (don't know why but I do). I had some soy milk I had bought when I couldn't have dairy b/c of a bout of colitis some anti-biotics had given me and decided to finish it off by getting a box of the multi-grain Cheerios, thinking that would be better than all oats. I ate them 4 days in a row and for the last 2 days I have been having left side pain again along with gas and bloating. After doing this a few times now, I know it's the oats!
All that to say that if you have IBS symptoms (or any inflammatory condition that won't go away) I would HIGHLY recommend that you ask your naturopath about the ELISA blood test. The AMA is still behind the game on the concept and is frankly too proud to embrace something that the naturopaths discovered. I am living, breathing proof that it works and I've had other friends who have had similar results. It costs a couple hundred bucks (most insurance companies are too cheap and ignorant to cover it) but it's well worth the money. I've saved many times that in copays for doctor appts and prescriptions over the last 3 years. Here is a link to my naturopath's website... http://www.centerforfoodallergies.com/. Best of luck in your search for good health!