Which electrology needle is designed to deliver current to the lower follicle and papilla only?

• A. Uninsulated
• B. Hollow
• C. Insulated
• D. Coiled

Answer: (C)

Insulation is used to focus the current where you want it. An insulated needle has the shaft coated except for the tip, so when it’s inserted, the electrical energy is concentrated at the exposed tip. This targets the lower part of the hair follicle, near the papilla, delivering enough energy there to coagulate or dissolve the follicle’s cells without activating tissue higher up in the follicle or on the skin surface. That focused delivery helps maximize effectiveness while minimizing collateral damage.

If the needle were uninsulated, current would travel along the entire shaft, increasing the risk of unwanted tissue heating and damage. A hollow needle isn’t designed to confine energy to a specific follicle region; it’s used for delivering solutions or for certain injection-based methods. A coiled needle changes how energy is distributed and isn’t specifically aimed at targeting only the lower follicle and papilla.