Paradoxical effects of hair removal systems: a review.
نویسندگان
چکیده
Although a variety of lasers have proven to be clinically effective for long-term hair removal, the use of these lasers has also been associated with undesirable side effects, such as hyper- and hypopigmentation, crusting, erythema, and edema. One notable side effect that seems to be underreported in the literature is the growth of fine dark hair in untreated areas close to the treated ones. This contradictory hypertrichosis is known as the paradoxical effect. In this paper, we review the published reports of the paradoxical effect and offer some possible explanations for this effect. The paradoxical effect has been documented most commonly after the use of induced pulse light and alexandrite lasers. One possible explanation is the activation of dormant hair follicles by suboptimal fluences. Another mechanism may be the synchronization of hair growth cycles by direct light stimulation.
منابع مشابه
Systematic review (Meta-analysis) of clinical trials on hair removal Lasers
Background: The theory of selective photo-thermolysis led to the development of a variety of different laser systems which range from the shorter spectrum of 694nm ruby laser to the middle with the 755nm alexandrite and 810nm diode lasers to the long end with the 1064nm (Nd:YAG) laser. Objective: A systematic review on the clinical trials with use of various laser sources for hair removal...
متن کاملPalpable Purpura: An Uncommon Side Effect of Alexandrite Laser Hair Removal
A 40-year old woman was visited at our clinic with a history of palpable purpura appearing after alexandrite laser (Apogee 5500 Alex, 15mm spot shot, 755 nm wave length, 18 j/cm2 fluence) hair removal. The skin lesions were located bilaterally on the lower extremity (Figure1). Other physical examinations were unremarkable. The patient had no history of taking medications, underlying systemic di...
متن کاملLaser-assisted hair removal: comparison of long-pulsed alexandrite and long-pulsed Nd:YAG lasers, individually and in combination
Background and aim: Laser is one of the most recent techniques which has widespread use in the treatment of many skin diseases. This technique has been successfully used to remove unwanted hairs in hirsutism. The aim of this study was to evaluate and compare the efficacy and safety of long-pulsed 755 nm alexandrite and long-pulsed 1064 nm Nd: YAG lasers individually and in combination for perma...
متن کاملLasers and light sources for the removal of unwanted hair.
The long-term removal of unwanted hair has become one of the most common and popular cosmetic laser treatments being performed around the world. This manuscript will review a variety of lasers and light sources that have been and are currently being used for epilation of the skin. All of the lasers and light systems currently available do work for long-term hair removal; it is the responsibilit...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
- Journal of cosmetic dermatology
دوره 5 4 شماره
صفحات -
تاریخ انتشار 2006