Scar, Acne Scar and Keloid Treatment — Siam Dermatology Samut Prakan
Scars, atrophic acne scars and keloids are skin problems that directly affect confidence in everyday life. Each type of scar has a different mechanism and appearance, so the treatment technique has to be chosen to suit it. At Siam Dermatology clinic in Samut Prakan, our specialist dermatologists assess the type of scar and the condition of each person's skin, then plan personalized treatment aimed at safe, natural-looking results.
Types of scars we treat
Understanding the type of scar is the first step toward targeted treatment:
Atrophic acne scars — Depressed scars, divided into ice-pick (small, deep holes), boxcar (sharp edges with a flat base) and rolling (sloping, wave-like edges). Each type needs a different technique.
Hypertrophic scars — Raised red scars that stay within the boundary of the original wound. They often flatten on their own within 1-2 years and respond well to steroid injections.
Keloids — Raised scars that grow beyond the boundary of the original wound. They are more common in people with darker skin, especially on the earlobes, shoulders, chest and back, and need a treatment that combines several techniques.
Technologies and procedures used
Our doctors choose procedures to suit the type of scar and the condition of the skin:
Fractional CO₂ Laser — The gold standard for boxcar and rolling acne scars. It stimulates new collagen in the dermis, reducing depth and smoothing the skin. Typically 2-4 sessions per course.
RF Microneedling — Fine needles combined with radiofrequency energy stimulate collagen beneath the skin without much damage to the outer layer. Suitable for darker or sensitive skin, and helps reduce the risk of post-inflammatory hyperpigmentation (PIH).
Subcision — A special needle is used to release the fibrous bands beneath rolling acne scars so the skin lifts back toward its normal level. Often combined with filler or microneedling.
TCA CROSS — Concentrated TCA acid is applied to individual ice-pick scars to stimulate new tissue, so the holes gradually become shallower.
Intralesional steroid injection — Intralesional Triamcinolone injection is the standard treatment for keloids and hypertrophic scars. It helps flatten the scar and reduces itching and pain. Typically injected every 4-6 weeks.
Pulsed Dye Laser (PDL) — Helps reduce redness in new scars and hypertrophic scars. Used together with steroids in keloids with dense blood vessels.
Self-care after procedures
Aftercare has a major effect on results:
Sun protection — Apply SPF 50 PA++++ sunscreen every day without fail for at least 3 months, and avoid strong sunlight.
Skin care — Do not pick at scabs, and use a gentle moisturizer to care for the skin.
Follow-up — Attend every follow-up appointment so the treatment plan can be adjusted to how your skin responds.
Why choose Siam Dermatology
The clinic is run by specialist dermatologists certified by the Medical Council of Thailand, who choose techniques to suit the type of scar and, in particular, Asian skin. We use laser equipment that meets international standards, our pricing is transparent, and we always discuss the treatment plan with you before starting any procedure.
Frequently asked questions about scar and acne scar treatment
Can acne scars really be made smooth? Most acne scars can become noticeably shallower with procedures suited to the scar type, such as Fractional CO₂ Laser, Subcision or TCA CROSS, but this takes multiple sessions and ongoing care. The doctor will assess you and plan treatment individually.
Can keloids be cured completely? Keloids can come back. Treatment focuses on flattening the scar and reducing symptoms, using intralesional steroid injections together with other techniques, so continued follow-up is needed for good results.
Can people with darker skin have laser treatment for scars? Yes, but a technique that lowers the risk of dark marks must be chosen, such as RF Microneedling, which affects the outer layer of skin less. The doctor will choose a method suited to your skin tone for safety.
How many sessions are needed to see results? It depends on the type and severity of the scar. Many procedures are done as a course, for example about 2-4 sessions of Fractional CO₂ Laser. The doctor will assess you and give a clear plan before starting.
If you have scars, acne scars or keloids you would like to improve, starting with an assessment by a specialist doctor is the safest way. Book a consultation with a dermatologist at Siam Dermatology, Samut Prakan. Call +66 61 448 7000 or LINE @siamderm
Written by Dr. Patara Voravutinon, Dermatologist · Last reviewed 16 July 2026
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