Concise answer
Different scar shapes arise from different structural changes. A method suited to tethered rolling scars may not adequately treat narrow ice-pick scars, surface roughness or post-acne pigmentation.
Combination treatment does not mean performing everything together; it often means sequencing targeted methods with appropriate recovery.
The plan should be simplified when skin is sensitive, acne remains active or pigment risk is high.
When evaluation may help
Detailed scar examination helps identify which component contributes most and whether a staged combination offers a worthwhile balance of improvement and downtime.