I’ve been diagnosed with psoriasis two years ago. Most of the areas on my body are affected by psoriasis to some degree, but the worst patches are on my scalp. I know a hat with the long cover is a must if I even want to go out, but since the hotter weather is coming and I want to be able to hang out outside a bit more, what kind of suntan lotion do I need?

Do I just buy the regular lotion with highest SPF, or are there suntan lotions that are specifically made for the damaged skin? SO far I've just used the 'double dose' of my regular moisturizer which probably wasn't too smart.