Alcohol is thought to trigger psoriasis outbreaks, possibly by increasing inflammation. Alcohol opens the blood vessels in the skin. When your blood vessels are dilated, white blood cells, including the T cells that are believed to be responsible for psoriasis, can sneak into the outer layers of your skin more easily -- and you don’t need to be inviting more T cells. If your psoriasis is uncontrolled, consider cutting back or eliminating alcohol to see if symptoms improve.
Processed sugar is a villain for health in general and possibly for psoriasis. Excess sugar intake may not only promote inflammation, it's also a major contributor to weight gain and as we know, being overweight can aggravate your psoriasis. So stay away from added sugar, this include added sugar in packaged foods.
Psoriasis is an inflammatory condition. Junk foods tend to be high in saturated and trans fats and refined starches and sugars, all of which can promote inflammation, which may be one reason they are also associated with a higher risk of heart disease and other health conditions.
Gluten is a protein found in some grass-related grains, including rye, wheat, and barley. Some people find that eliminating gluten from their diet helps improve their psoriasis symptoms. But a gluten-free diet can be tricky to follow (and expensive), so ask your doctor to screen you for gluten intolerance before eliminating this from your diet.
Dairy products contain the natural inflammatory arachidonic acid. Some people with psoriasis report that cutting back on dairy products also eases their symptoms. Cow’s milk is one of the biggest culprits because it also contains the protein casein, which has been linked to inflammation. Some people with psoriasis have found that soy milk is a good substitute for cow's milk.
Some people report that consuming plants from the nightshade family -- which includes peppers, white potatoes, eggplant, and tomatoes -- exacerbates their psoriasis. These vegetables contain solanine, a chemical compound that has been shown to trigger pain in some people. Some people with psoriasis find these veggies aggravate their skin condition.
Citrus fruits, such as grapefruit, oranges, lemons, and limes, are a common allergen. Sometimes, an allergic reaction can cause psoriasis to flare. See if eliminating them from your diet improves your skin.
Some people with psoriasis find condiments and spices like pimento, cinnamon, curry, vinegar, mayo, paprika, Tabasco sauce, Worcestershire sauce, and ketchup to be their enemy because substances in these condiments can increase inflammation.