eli5: why do mouth numbing gels like orajel numb your mouth and teeth but not hands/skin?

Question

it numbs my tongue instantly but even after 5-10 minutes on skin it feels exactly the same.

In: 57

Answer 1

Orajel uses a special formulation that will easily be absorbed by the gums but not the skin. The active material benzocaine is used in different formulations for different purposes, for example sunburn medicine uses it.

Answer 2

Orajel uses a special formulation that will easily be absorbed by the gums but not the skin. The active material benzocaine is used in different formulations for different purposes, for example sunburn medicine uses it.

Answer 3

It absolutely does numb your skin. The active ingredient in Orajel is benzocaine, which is also used in ointments for various other achey body parts, including throat, ears, and skin.

Answer 4

It absolutely does numb your skin. The active ingredient in Orajel is benzocaine, which is also used in ointments for various other achey body parts, including throat, ears, and skin.