CO2 laser and keloids: what to know

A keloid is a raised scar that grows beyond the original wound boundary. CO2 laser creates controlled skin injury, and any injury can trigger an abnormal scar response in someone who is prone to keloids. The risk discussion depends on the body site, treatment depth, size of the area, previous scar behaviour, and the reason for treatment.

A firm, itchy, painful, or enlarging bump after treatment is not something to diagnose from a photograph alone. Some raised scars remain within the original injury boundary, while keloids extend beyond it. A dermatology assessment can distinguish these patterns and plan treatment accordingly.

Tell the clinician about every previous raised scar, scar treatment, piercing reaction, and family history of keloids. Ask whether CO2 laser is appropriate or whether another approach is safer for the concern. Do not proceed with an informal or home laser device.

If treatment is recommended, follow wound care instructions closely and attend planned reviews. Avoid picking, friction, and unapproved products. Early review of a new firm or expanding scar may allow the team to discuss options such as silicone-based care, injections, pressure strategies, or other specialist treatment.

Contact the treating clinic for a raised area that is enlarging, increasingly itchy or painful, bleeding, ulcerated, or limiting movement. Seek prompt care for pus, spreading redness, fever, or severe pain. Facial swelling with breathing difficulty or eye symptoms needs urgent assessment.

Ask how your scar history affects eligibility, whether a test area or alternative treatment is appropriate, and how a possible keloid would be monitored. Clarify wound care, follow-up timing, and which early changes should prompt a call.