Is Vit d = vitamin d? How much?

I had pustular psoriasis for about 15 years on hands and feet, quite bad as feet would crack when walking. After being diagnosed with cancer I read that Vit d could help, had my levels checked and extremely low so started taking vit d and psoriasis disappeared. If I forget to take the pills for a couple of days my hands and feet start to itch as if returning. Steroids and barrier creams had not helped prior to vit d. Everyone diagnosed with psoriasis should have their vit d levels checked

I have 2 toes affected. Get quite sore at times. Also have pustular psoriasis sole of left foot. See podiatrist 6 weekly helps me

what is dactylitis?

I have it on my feet. Especially my left foot and ankle. It has covered almost my entire foot and ankle. My right foot only has a few small areas on the bottom of my foot and around my toes.