Re: Food intolerance to Onions?
When you eliminate onions from diet, do your symptoms go away? If so, that is your answer. If not, one of the most common causes of nausea and bloating is excess acid in stomach. You could try some ranitidine or omeprazole, over the counter, to see if that helps. Excess acid usually causes nausea when the stomach is empty, like in middle of night or 1st thing in AM, and is worsened by smoking, caffeine, spicy, acidic foods and anti-inflammatory meds like ibuprofen or aleve. If the nausea persists even without the onions, see a gastroenterologist, since your other docs have not been helpful. Have you had an H. pylori blood test done?