What helps my psoriasis

Hi, I have suffered with psoriasis for 13 years, I get it all over my body, my scalp, under my nails and in my ears. The only time I am ever psoriasis free is after a holiday in the sun. I have tried many creams and treatments etc but due to suffering from severe stress and anxiety I often feel like I'm fighting a losing battle. Recently my scalp has been covered and the itch was unbearable I started taking anti hystamine tablets ( citrezine hydrochloride)from over the counter and the itching is very rare now which is great as its obviously better not to scratch. I also found that putting raw fish oil on my scalp helps too. And I always put warm olive oil on and leave it on over night. For my skin, I get it very bad all up my thighs and back in large patches and I have tried all the expensive creams with little improvement until I found cuticura moisturiser which costs £1 a tub and what a difference it makes. I smother my skin with it morning and night and it really helps a lot. I also use steroid creams but they don't seem to have much effect. The sun beds clear bits up too but I am trying to stop using them as they are bad for you. I also noticed that fizzy juice and alcohol flare it up almost instantly and make it so itchy. If I mainly stick to water that also helps. Palmers skin therapy oil has also been helpful when it's been quite bad. The doctor has told me there is nothing they can do for psoriasis under the nails which is annoying as I get it bad and it makes my nails look awful. Due to the scalp psoriasis being so severe it was causing hair loss. I started using nioxin shampoo and conditioner and may hair is so much thicker and healthier, it's expensive but totally worth it! I am now back using tgel as the doctor prescribed me alphosyl which seemed to make my scalp itchy and didn't help at all.