Q-Switched Alexandrite Laser Safe and Effective for Removal of Traumatic Tattoo: Study
Written By : Medha Baranwal
Medically Reviewed By : Dr. Kamal Kant Kohli
Published On 2026-04-16 15:00 GMT | Update On 2026-04-16 15:00 GMT
Korea: A recent study has revealed that the Q-switched alexandrite laser is a safe and highly effective treatment for removing various traumatic tattoos in Asian skin, achieving excellent clearance without scarring or permanent pigmentary changes.
The research, published in Dermatologic Surgery by investigators from the Division of Dermatology, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea, evaluated the performance of a 755-nm Q-switched alexandrite laser in patients with traumatic tattoos. These tattoos differ from decorative tattoos, as they arise from accidental implantation of foreign particles into the skin following penetrating injuries, abrasions, or explosive trauma. Historically, removing such embedded pigments posed a challenge, often resulting in scarring or long-lasting discoloration. The advent of Q-switched laser technology has transformed this therapeutic landscape.
The study assessed 27 patients with Asian skin types who collectively had 36 traumatic tattoos. Among them were 19 penetrating injuries in 16 patients, 16 abrasive injuries in 10 patients, and one case related to a bomb explosion. The laser used delivered light at a wavelength of 755 nm with a pulse duration of 100 nanoseconds, a configuration designed to selectively target pigment particles while sparing surrounding tissue.
The researchers reported the following findings:
- The treatment achieved high rates of pigment clearance across traumatic tattoo types.
- Penetrating tattoos showed more than 76% pigment removal after an average of 1.7 sessions.
- Abrasive tattoos required a mean of 2.4 sessions to achieve similar clearance.
- The depth and mechanism of pigment deposition influenced the number of sessions needed.
- Most lesions responded effectively to an energy fluence of 7.5 J/cm².
- One scarred explosive tattoo and one soil-contaminated abrasive tattoo required special management.
- Overall, cosmetic outcomes were favorable.
- No permanent scarring or lasting pigmentary changes were observed.
- Any temporary side effects resolved without long-term consequences.
- The safety profile is particularly significant for Asian skin, where pigmentary complications are a concern.
The authors conclude that the Q-switched alexandrite laser represents a reliable and minimally invasive option for managing traumatic tattoos in Asian skin. By delivering targeted, high-energy pulses that fragment pigment particles for gradual clearance by the body’s immune system, the technique offers effective results with a strong safety profile.
As accidental skin tattooing from injuries remains a clinical concern, especially in occupational and traumatic settings, the study supports the role of advanced laser technology in restoring skin appearance without compromising safety.
Reference:
Chang, S. E., Choi, J. H., Moon, K. C., Koh, J. K., & Sung, K. J. (1998). Successful Removal of Traumatic Tattoos in Asian Skin with a Q-switched Alexandrite Laser. Dermatologic Surgery, 24(12), 1308-1311. https://doi.org/10.1111/j.1524-4725.1998.tb00005.x
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