There are multiple symptoms that go along with gluten intolerance. But the same symptoms could mean there is something terribly wrong with your gastric acid-the important acid responsible for digestion.
Eczema and otherwise itchy skin could easily a condition of your diet or lack of ability to digest that diet. Consider this eben if you think it may be environmental.
If you experience headaches after a meal they could be the result of gluten intolerance and also because of a problem with gastric acid.