This is how I "cured" my psoriasis. It is actually a treatment because if I stop then it will slowly come back. This treatment uses cheap easy items you can get at your grocery store. It works 100% for me, I've been free of psoriasis for over a year and half now. I currently do just these simple things. I eat whatever I want. I don't take any supplements. You have to keep doing these things and you can't just do them sporadically or just when you have break out.
1) Green Drink
This is what I call it. It's basically blended spinach and water. Basically, you are extracting the chlorophyll from the cellulose walls of the spinach so your body can process it (most usually goes right through you). Takes about 5 minutes to make. Fill a blender generously with spinach leaves and then fill it up the top with water. Blend. Strain. You should have dark green water left over. Drink a glass of this daily at first, then eventually you can tamper off to three times a week. You can add things to make it taste better, but I keep it simple/stupid or I'll find excuses not to make it. Literally, takes 5 minutes to prepare enough for three days. Do not keep longer than three days, make it fresh again. This is my cure. If I stop for a couple weeks, it comes back. Somehow it keeps my digestive track in good order.
Drawbacks/Complaints:
Taste: yeah it tastes gross at first, but you will get used to it. Put things in it to taste better. But just do it.
Time: Seriously, it takes 5 minutes.
Laxative: It will loosen you up at first, but after your body adjusts, you will be fine.
Change in color: Your movements may turn darker in color, greenish. It's a small price to pay and doesn't matter.
I kept up with it. Immediately starting seeing improvement after a couple weeks. Progress was slow but steady. Completely recovered now, only drink it 2-3 times a week. Existing sores will take a while to get rid off, but you should see a reduction of new ones very quickly. Give it a shot, it's cheap, healthy, and safe.
2) Moisturize
Body:
After every single shower, I rub Johnson's and Johnson's Baby Oil with aloe/vitamin e over my entire body. It takes about 1-2 minutes if you rub onto your skin while still wet. Then pat dry. You have to moisturize with something to prevent dryness. It's cheap and effective, don't be lazy. My GF thought it was weird, but she got over it. I'd rather rub a little baby oil on my skin then have horrible sores on my entire body.
You can take a bath in warm water and pour baby oil on top, if you want a really good healing after a bad breakout. Just rub/soak in it for an hour (no soap), then pat dry.
Scalp:
Even with Green drink, my scalp was still bothering me. I finally found a way to fix it. Use Conditioner and use it properly. I switched to Bed Head Moisture Maniac Conditioner and Shampoo. When I start the shower I immediately put on the conditioner (mixed with some shampoo) onto my head and scrub. I then leave it in there the entire shower and rinse at the end.
3) Eliminate Irritants
Bed:
Wash your sheets regularly. Why? Dust mites. They irritate my skin. I also spray my bed with a dust mite killer called disodium octaborate tetrahydrate. It's a salt and safe unlike other chemicals, google it.
Shower:
I don't use soaps that can dry my skin, no more bar soaps. I use Biore's blemish fighting ice cleanser in a green bottle exclusively.
Head:
I stopped using hair spray. It was really drying out my scalp. I switched to Fiber made by American Crew in those little round bottles. That in combination with Green drink and conditioner solved my scalp issues permanently.
Washer:
I wash my clothes using Seven Generations Blue Eucalyptus and Lavender.
Hope this helps!