Section : Conference Notes

Update in Laser Hair Removal

  • Known limitations: a reminder
    • the result might might be good but “complete” hair removal is not possible
    • ineffective on white hair


  • Combining medical treatments with lasers
    • Ornithin decarboxylaser (eflornithine) is a known treatment against hirsutism and is a known medical topical treatment to induce hair thinning.
    • The presenter sought to evaluate the effect of topical eflornithine + lasers (abstract:
    • Monthly treatment sessions with the alexandrite laser for  6 months (one side treated with l+e and the other treated with laser alone)
    • Results: with eflornithine and lasers works better after 3 months. Although the difference is less visible after 6 months, it remains statistically significant.


  • Laser hair removal can induce hair growth:
    • It is a paradoxical effect
    • The presenter reports a patient undergoing 7 Alexandrite laser sessions (energy 23-47 J/cm2) developeing hair growth.
    • Comments:
      • in an Iranian study in 2009 in including 991 patients, a paradoxical effect was observed in 5.5% of cases.
      • When combining the results from several studies and reports, the overall risk seems to be around 5%
    • Solution: inform the patient of the risk of paradoxical hair growth


Dr Christophe Hsu – dermatologist. Geneva, Switzerland
Source of Information: Lui H. Laser Pearls. Pearls from Clinical and Investigative Dermatology. 2014 (4) – 21st Regional Conference of Dermatology; Danang (Vietnam)