Conclusions

The document discusses the evolution of hair techniques and therapeutic methods for treating different types of alopecia. Non-scarring alopecia, which includes androgenetic alopecia, alopecia areata, telogen effluvium, and anagen effluvium, is more common and seen frequently in daily practice. Scarring alopecia, characterized by permanent hair loss and skin scarring, is less common and includes conditions like lichen planopilaris or frontal fibrosing alopecia. The document also notes that scalp biopsies are not useful for diagnosing hair shaft disorders, instead recommending trichoscopy and electron microscopy. Additionally, it introduces microneedling, a minimally invasive procedure that punctures the skin superficially with fine needles, as a new method for hair stimulation and transdermal delivery of therapeutic drugs and vaccines.