Patient most likely has poison oak/ivy, which presents >1 day after exposure (Type 4 hypersensitivity) and will lead to a sharp line between rash and unaffected skin
Patients do not receive prophylaxis against poison oak/ivy
Cat scratch can lead to cat scratch fever, which leads to lymphadenopathy but will not lead to vesicles/bullae
Just as another POV, you might have seen well-demarcated and thought erysipelas..but remember that is not bullous. Plus, everything else fell more in line with Type 4 HSN.
submitted by โcarolebaskin(109)
I hear woods and well demarcated, spreading, pruritic rash and I think poison ivy
Another way to get there: here's no fever but he is v v itchy, so think type IV HSR
Abrupt, sharp line of demarcation, no systemic signs, and mention of environmental exposure should make you think less of strep skin infections
So we're thinking some contact in the forest and we're back at poison ivy or some other allergen
Can treat with antihistamine, but what about prevention? Avoid the woods.
Google bullous poison ivy