June 2026 in “Dermatology and Therapy” In this retrospective analysis, patients with trichodynia who were unresponsive to standard treatments showed significant symptom improvement after receiving intradermal botulinum toxin type A, with nearly all patients benefiting, particularly those with scarring alopecia.
This study found that subcutaneous administration of Botulinum toxin type A significantly reduced histamine-induced itch intensity and neurogenic inflammation in human skin compared to saline.
10 citations
,
October 2014 in “Plastic & Reconstructive Surgery Global Open” In this case study, Botulinum toxin type A injections were associated with improved hair growth and scalp condition in a patient with radiation-induced alopecia, though the mechanisms remain speculative.
October 2025 in “Journal of Cosmetic Dermatology” In this study, researchers found that type A botulinum toxin injections can reduce hypertrophic scars effectively, though more high-quality studies are needed to confirm the precision and stability of these therapeutic effects.
15 citations
,
January 2020 in “BioMed Research International” In this study of patients with androgenetic alopecia, botulinum toxin type A was found to significantly increase hair counts and improve hair density and coverage, with enhanced results observed when combined with oral finasteride, revealing a safe and effective treatment approach without adverse effects.
