A wide range of benign and dangerous pathology can present with a rash
Fever
Toxic appearance
Hypotension
Mucosal lesions
Severe pain
Very old or young age
Immunosuppressed
New medication
Plaque/scaley papule
Eschar
Fissure/erosion/ulcer
Purpura/petechia
Plaque/smooth papule
General approach to rashes
Acute generalized exanthematous pustulosis
Anticonvulsant levels and reloading
Allergic reaction
Tick removal
Aphthous stomatitis
Bioterrorism antibiotics
Atopic dermatitis