💡 Psoriasis = Auspitz sign, Munroe microabscess. Lichen planus = 6 Ps, Wickham striae.

💡 Pemphigus = Intraepidermal, flaccid, Nikolsky +. Pemphigoid = Subepidermal, tense, Nikolsky -.

💡 Primary syphilis = painless chancre. Chancroid = painful.