The 5 types of Psoriasis ( what is known)

1. Plaque psoriasis or psoriasis vulgaris  - Mycobacteria

overlaps with psoriatic arthritis, crohn's, type 2 diabetes, high cholesterol

2. Erthrodermic psoriasis - specific mycobacteria tuberculosis

https://www.ncbi.nlm.nih.gov/pubmed/25120233

causes reddening, pain, and large skin shedding

3. Guttate Psoriasis - Strep infection (impetigo)

feels like sandpaper

4. Inverse Psoriasis - candida

diaper rash, sweat zones, very red and raw in creases

5. Pustular psoriasis or impetigo herpetiformis - staph. aureus

pus filled bumps (white blood cells)  of childhood or pregnancy which appears to be triggered by staph reacting to hormone fluxes, aspirin derivatives, and psoriasis medication

associated with eczema or atopic dermatitis (constant staph infections?)

note that staph has been shown to be sensitive to aspirin
http://dartmed.dartmouth.edu/winter03/html/vs_aspirin.shtml