Summary
Background and objectives
Hirsutism or excess hair growth is a common dermatological problem in females, affecting up to 10% of females worldwide. We aimed this study to compare the two hair-shortening methods shaving vs. snipping among hirsute women regarding the outcome of the therapy and also the paradoxical hypertrichosis phenomenon (terminal hair regrowth) 6 months after the final therapy session.
Materials and Methods
In this study, 129 premenopausal women affected by hirsutism were randomly divided into two study groups according to hair-shortening method: shaving as group A (66 patients) and hair shortening by scissor as group B (63 patients). Each patient received six alexandrite laser therapy sessions every month for six consecutive months. Chin hairs in a 5 × 5 cm2 zone were counted, and the paradoxical hair regrowth was evaluated four times during the study: once at baseline, once before the third session, once before the sixth session, and once 6 months after the last laser session.
Results
Before the third session, the counts were 15.06 ± 5.20 in group A and 13.07 ± 4.44 in group B (P = 0.022); both counts were meaningfully less than the baseline count (P < 0.001). The counts before the sixth session were 2.80 ± 1.16 in group A and 2.71 ± 1.12 in group B (P = 0.673); the counts were significantly lower than the previous session (P < 0.001). Six months after the last laser session, the counts were 11.27 ± 9.30 in group A and 8.15 ± 3.12 in group B (P = 0.012). Paradoxical hypertrichosis was observed in three patients of group A vs. no patients in group B.
Conclusion
We found that alexandrite laser therapy is really effective for treating hirsutism. Both shaving and using a scissor for hair shortening showed similar short-term results, but in one-year follow-up, paradoxical hypertrichosis was only observed in shaving group and also a lower hair count was observed in the snipping group.
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