Yeqin Dai

To the Editor, Microneedling is increasingly used as an adjunctive treatment for androgenetic alopecia (AGA), aiming to enhance transdermal delivery of minoxidil and activate perifollicular signaling through controlled dermal injury [1, 2]. While short-term efficacy has been reported, the safety margins of low-depth yet high-frequency protocols remain incompletely defined. Notably, hair-shaft structural damage has not been systematically described as a complication of microneedling for AGA.

To the Editor, Botulinum toxin (BTX) is a cornerstone of minimally invasive cosmetic procedures, widely employed for dynamic wrinkle treatment due to its efficacy and favorable safety profile [1]. However, complications, though rare, can significantly affect patients both clinically and psychologically.