Which methods are effective for permanently destroying hair follicles?

Electrolysis and cryotherapy are both recognized methods for permanently destroying hair follicles.

Electrolysis involves the use of an electric current to destroy the hair follicle's ability to grow hair. A fine needle is inserted into the hair follicle, delivering a current that effectively kills the follicle. This method is effective because it targets individual hair follicles, ensuring that they do not regrow.

Cryotherapy, on the other hand, employs extreme cold to damage the hair follicle. This method freezes the hair follicle, leading to its destruction. While it is less commonly used than electrolysis for permanent hair removal, it can be effective depending on the circumstances and follow-up treatments are necessary for optimal results.

The other options include methods that either do not result in permanent hair removal or are not specifically designed for that purpose. Waxing and shaving, for instance, are temporary hair removal techniques. They remove hair from the surface of the skin but do not impact the hair follicle, allowing hair to regrow relatively quickly. Similarly, bleaching alters the color of the hair but does not affect its growth, making it ineffective for permanent removal.