QuickFX Pimple Eraser

It might be an ingredient in the product that caused stinging. Mine didn't when I used it before.

spot treatments usually contains acid and that's normal, in this case (quickquickfx pimple eraser) it has salicylic acid, which can definitely cause sting and itch.

i think its normal cuz it has alcohol and salicylic acid, which may cause stinging or itchiness esp if your pimple is in the verge of popping

Yes, but it's best to stop it for a while. I know some friends who experienced stinging and eventually their skin got chemical burns. I have no intention of scaring or making you anxious. It's just best to stop or take a breather.