Unfortunately, in cases like yours, it can be very difficult to pin point the cause of symptom flare ups when they occur. It could be something that you are eating that you only have a reaction to in combination with something else. This could be anything from stress to the weather. By this I mean that your body may only just be tolerating a certain food (and you do appear to have a number of intolerances) and a secondary factor adds additional stress to the body, which then produces your symptoms. I would continue to make a note of factors - other than food - in the diary notes section of your food diary and see if you can see any links to your symptoms.

Your basic diet sounds good. If you feel you have been eating a little more sugar and alcohol (which is liquid sugar!) recently, cut right back and see if that helps. I would also try reducing, or even temporarily removing, dairy products from your diet, as this food group has been strongly linked with eczema in the past. Also, make sure you eat 1-2 portions of oily fish a week, if you can, as these contain calming, anti-inflammatory oils that may help your skin. Oily fish include salmon, sardines, fresh tuna (not tinned) and mackerel.

The quickest way to find out about any additional food intolerances you may have is to have a test. This can be quite expensive, but, if you can afford it, I recommend a company called www.yorktest.com. There are other companies too that you will easily find on the internet. This type of test is very accurate and uses a pinprick of blood. It might be worth considering.

I really sympathise with how this must make you feel, so I hope there is something that helps you in this answer.