Labyrinth do you eat dairy? Check this out as it is linked to allergies and psoriasis. I gave up dairy many moons ago and it helps alot. I also do not eat much sugar unless it is in fruit of course.
Good luck
"Why We Don’t Do Dairy
Dairy provokes an inflammatory response in the gut, which can adversely effect how you digest and absorb not just dairy products, but all your food. Furthermore, this chronic inflammation can cause “microperforation” (tiny holes) of the intestinal lining, allowing dairy proteins and other foreign substances to cross into the bloodstream (where they do not belong). This causes an immune response as the body attacks these foreign proteins, and is linked to autoimmune conditions such as asthma, lupus, allergies, arthritis, psoriasis and acne.
As an aside, celiacs (those with a gluten intolerance) tend to cross-react with dairy, which means consuming dairy can exacerbate their celiac disease. This is primarily because of the similarity in structure between gliadin, a protein constituent of gluten, and casein (milk protein). It has been shown that 1/3 to 1/2 of celiacs also have specific milk protein intolerances.
It is important to note that the dairy-induced inflammatory response is a separate issue from lactose intolerance (which is simply the inability to properly break down the milk sugar). In general, dairy products are bad news for us, regardless of whether we can digest lactose or not. You may not even realize you have an issue with dairy until you give it up for a period, and then reintroduce it. Everyone responds differently, but most of the time the reintroduction of dairy after four or more weeks of being completely dairy-free is not a pleasant experience. Cheese (a concentrated milk protein) is one of the most common food intolerances."