it numbs my tongue instantly but even after 5-10 minutes on skin it feels exactly the same.
In: 57
Skin has an outer layer of deceased keratinized skin cells tightly bound with each other. They’re pretty waterproof and thus also resist absorption of many other things. Including the benzocaine mix in Orajel.
They technically do absorb it, but very very slowly compared to the mucus membrane tissues of the cheeks, tongue, and gums.
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