BACKGROUND: Laser hair removal treatment for hairlines with an unsatisfactory appearance often leads to an unnatural appearance; however, few studies have reported treatment outcomes.
OBJECTIVE: To explore the satisfaction rate of laser hair removal involving the hairline.
METHODS: Retrospective analysis.
METHODS: Data from 5 clinical institutions.
METHODS: Patients (915; 630 female and 285 male) who underwent laser hair removal.
METHODS: Issues associated with hair removal were classified, and their proportions were calculated. Hair transplantation was performed to improve the appearance of different hairline issues.
METHODS: Relevant indicators of hair transplantation and postoperative effects.
RESULTS: Overall, 82 patients were unsatisfied with their hairline appearance; of these patients, 58 underwent hair transplantation to improve the hairline. Additionally, demographic statistics showed that 68% and 32% of patients were in the 20 to 30 and 30 to 40 years age groups, respectively; there were no patients in the 40 to 50 years age group. Among female patients who underwent hair transplantation, 25% had a poor hairline position, 64% had a stiff hairline appearance, and 11% experienced both issues. Among male patients, 50% had a stiff hairline appearance, 28% had temporal absence, and 22% experienced both issues. Surgical treatment included moving the hairline forward and rebuilding the frontal curves. All patients were satisfied with hair transplantation outcomes.
CONCLUSIONS: Laser hair removal can result in diverse types of unnatural hairlines. Hair transplantation has been proven to effectively improve the aesthetic appearance of the hairline.

BACKGROUND: Temporary hair loss at the recipient site after hair restoration surgery is called shock loss (SL). This study analyzed the risk factors for SL among patients who received follicular unit excision.
METHODS: This study included 621 patients (554 males and 67 females). Twenty-three patients had SL (9 males and 14 females with a mean age of 40.8 years). The prevalence of SL was analyzed in relation to sex, age, graft follicular units, cause of alopecia, diabetes mellitus, smoking, drinking alcohol, and local anesthesia agent.
RESULTS: Sex was identified as a risk factor for SL (odds ratio [OR]: 30.18; 95% confidence interval [CI] 9.43-96.55; p<0.001). Among female patients, age was identified as a risk factor for SL (OR:1.07; 95% CI 1.00-1.15; p=0.039). Over 40 years, the female pattern hair loss group had a significantly higher risk for SL than a female cosmetic group younger than 39 years.
CONCLUSIONS: Sex was the only risk factor found for SL in this study. In addition, age was identified as a risk factor for SL among female patients. We believe our results provide information and risk factors for SL, not only for hair transplant surgeons, but also patients who will receive follicular unit excision.
METHODS: This journal requires that authors assign a level of evidence to each article. For a full description of these Evidence-Based Medicine ratings, please refer to the Table of Contents or the online Instructions to Authors www.springer.com/00266 .