What type of food we have to take for psoriasis and psoriatic arthritis?

Try anti-inflammatory diet and elimination diet. Avoid nightshades. Everyone's diet will be a little different, but personally I stick to leafy greens, cruciferous vegetables, rice, sweet potatoes, eggs, lentils, fish, chicken, darkly pigmented fruits, and mostly avoid nightshades, legumes (thoroughly cooked if I do eat them, to remove lectins), refined sugar, processed foods, and intermittently avoid dairy.