Gianotti-Crosti Syndrome aka Acrodermatitis, Papular Infantile or Infantile Lichenoid
For the record, I hate rashes. And I'm always grateful when it's not scabies.
This is one that is sometimes seen in the pediatric population but rarely in adults. Seen ages approx. 9 months to approx. 12 years old.
Associated with Hepatitis B infection but now more frequently seen with EBV. Other viral causes include CMV, parainfluenza, etc. May have UFI with it.
Described as multiple erythematous flat-topped papules/vesicles (see pictures above)
Usually on extremities, buttocks, face but usually (not always) spares trunk. Usually not itchy but can be.
Lasts usually 2-4 weeks but has been seen up to 4 months.
Could obtain Hep panel, liver enzymes, PCR as part of work up.
Supportive treatment: emollient creams. if itchy can use diphenhydramine
You'll probably see this in parents who are tired of being told "It's a viral exathem". Ultimately, it is, but still. If you see this, sometimes giving someone the name of it will help. Still supportive treatment nonetheless.