Norwegian scabies (also known as crusted scabies) is a more severe form of scabies. For this form, the scabies rash can look similar to psoriasis and include:
Numerous blisters
Thick crust over the skin
Redness.
This rash does not tend to itch as much as other scabies infestations.
(Click Norwegian Scabies for more information on the rash caused by Norwegian scabies.)