Acne by area and pigment
When acne develops on different body parts, the resulting pigmentation follows the skin's movement, sun exposure, and thickness. Facial acne is prone to post-inflammatory hyperpigmentation due to thinner skin and more sun exposure. Back and shoulder acne heals with darker spots because clothing friction and pressure increase inflammation. In addition, the trunk skin tends to heal slower in many individuals.
Understanding acne by area causes helps distinguish post-inflammatory hyperpigmentation from true pigmentary disorders such as melasma. Post-inflammatory hyperpigmentation typically fades gradually with sun protection and gentle lightening agents. Melasma requires targeted pigment control and may involve hormonal considerations. Proper diagnosis guides whether topical therapy or energy-based treatments are appropriate.
Pigment from acne scars
Pigment can accompany acne scars, especially when inflammation damages dermal pigment cells. Superficial PIH creates flat brown patches that echo the shape of prior breakouts. Deeper scarring can trap pigment or alter skin texture, making color differences persist. Different body areas may show pigment differently as healing progresses.
Korean dermatology often combines gentle lesion removal with pigment control using nonablative lasers. Energy-based devices can brighten tone while minimizing downtime. Treatments are spaced to prevent rebound and maintain even texture. Avoiding picking or harsh scrubbing during healing helps prevent new pigment changes.
Laser and skincare myths
Many patients assume one laser fixes all pigment problems, but PIH and melasma respond to different light wavelengths. For acne-related pigment on the face, mild energy devices can brighten spots with manageable downtime. On the back or chest, stronger fractional lasers may be considered but require longer recovery. Sun protection remains essential before and after any procedure.
A realistic plan combines sun protection, targeted topicals, and selective laser sessions. Clinicians tailor wavelengths and cooling to minimize irritation while addressing pigment. Relying on myths or shortcuts often leads to uneven results. Ongoing maintenance and dermatologist follow ups help sustain improvements.