By Dr. Charlene CY Ng ｜Department of Dermatology and Aesthetic Medicine Center, Chang Gung Memorial Hospital "Laser treatment may initially lighten dark patches. However, some people later develop small white spots or a mottled appearance. These changes warrant reassessment before proceeding with further treatment." A patient’s experience A woman in her forties had undergone picosecond laser treatments monthly for nearly three years to address facial pigmentation. Although sh