4yo ds had second chickenpox vaccine yesterday. We took plaster off today and below the plaster site (not where the plaster was covering but below that, so about a cm below the puncture site, is a small plaster sized rectangle that is raised, hard and hot to touch. Ds says it only hurts if touched.
Is this something to worry about/seek medical advice. It was done by a pharmacist. He is totally fine in himself.