Is it meant to itch?

Hi there, I recently got my zapper from Klemens, I have used a pinch of Sea Salt in filtered water on the cotton wraps, and I notice it itchs quite a bit, I can feel tingling, but no throbing, I got them over the arteries best I can, I get a bit of rash afterwards, is this normal? or should it throb and leave no rashs

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