Thanks for your query to healthcare magic.
Vaccinations are considered to be safe. the rash
is unlikely to be due to vaccination.
She could have contracted this from the swimming pool,
cause could be 1. infection or 2. chemical induced dermatitis
As home remedy you can try soothing agents containing calamine
. if it still persists or worsens consult your dermatologist
, he might prescribe you antihistamanics.
Dr. Balaji Chinnasami- Assistant Professor