Well psoriasis is possible.. but considering at the nails is normal without the psoriatic changes, i prefer to put other differential diagnosis first.. history plays vital role here.. if the problem is chronic, my shot would be Chronic Dermatitis as the skin is excoriated and the lesion appears to be dry... acute problem could be due to Staph aureus infection... infected scabies is one of the differential but i could not see any burrows and vesicle
