decayedlooks
Iron
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This gets asked constantly and the same mistakes show up every time. Wrong scar type, wrong treatment, or still breaking out while wondering why nothing improves.
Fix The Acne First
If you're still getting new pimples, stop. Scar treatment while you're actively breaking out is pointless. Every new lesion can make a new scar. You're repairing collagen in one spot while the skin is getting wrecked somewhere else.
Get on a retinoid. Tretinoin or adapalene, whatever your skin tolerates, start it early if you're prone to atrophic scarring. If topicals don't cut it, isotretinoin. Wait until your skin is clear and has been clear for a bit before you spend a dime on scar revision.
That 6 month wait after accutane before lasers? Outdated. There was a split-face RCT comparing concurrent isotretinoin + fractional RF against waiting, and it found no safety difference. Confirm with your derm, but the old rule isn't gospel.
Know What You're Dealing With
Three types of atrophic scars and they need different treatments. Figure out which you have before buying anything.
Icepick: narrow, deep, pitted. Looks like a pen stab. TCA cross or punch excision.
Boxcar: wider, rectangular, sharp edges. Chickenpox look. TCA cross, punch elevation, lasers.
Rolling: wide, shallow, sloping. Fibrous tethers pulling the skin down. Subcision.
Most people have a mix. One treatment won't fix a mixed pattern.
TCA Cross For Icepick
High concentration TCA applied directly into the scar with a needle or fine applicator. Focal injury, collagen remodeling, scar base lifts up.
2026 JCAD review pooled 34 studies, 937 patients. Satisfaction high, improvement 50-80%. Multiple sessions beat single. Higher concentrations raised complication risk. Main adverse event was transient pigment change.
Concentrations in studies range 50-100%, classic protocol is 100%. Some derms drop to 70-90% for darker skin to lower hypopigmentation risk.
Process: cleanse, apply TCA into the scar, neutralize with saline, frost appears. Heals in 7-14 days with a small scab usually. 2-4 sessions, 4-8 weeks apart.
Dermatologist procedure. If a medspa is selling you a "TCA peel" for icepick scars, that's full-face application, completely different. Hypopigmentation risk is real in Fitzpatrick IV-VI. PIH is more common but usually fades.
Subcision For Rolling
Rolling scars are tethered by fibrous bands. No peel or laser releases those. You have to physically cut them.
Needle or cannula goes under the skin, bands get severed, scar lifts, collagen fills in. Blunt cannula has less bruising and hematoma than needle. Compression bandage after reduces hematoma risk.
Bruising and swelling guaranteed, 3-7 days minimum. Lifting is immediate, collagen remodeling continues 3-6 months.
Combination matters. The network meta-analysis ranked CO2 laser + subcision and CO2 laser + PRP highest for Goodman-Baron improvement and patient satisfaction. Subcision alone is decent, subcision + filler or PRP is better.
Operator dependent. Ask how many they do per month. Complications include hematoma, nodule, rarely nerve stuff.
Punch Techniques For Deep Scars
Icepick and small boxcar under 3-4mm, punch techniques physically remove the scar.
Excision: punch instrument cuts down to subcut fat, scar removed, single suture. Best for icepick.
Elevation: scar excised but not removed, base lifted and sutured using the scar tissue as graft. Boxcar with healthy base.
Grafting: scar excised, replaced with graft from behind ear. Larger deeper scars.
Surgical, so infection and poor healing possible. Not standalone either. Punch excision creates a new wound that usually needs laser or microneedling to blend. Best results from punch excision + concurrent CO2 resurfacing.
Microneedling: Texture Not Depth
Controlled dermal injury, triggers remodeling. Good for rolling and overall texture. Weak for deep icepick or boxcar.
2026 meta-analysis, 17 studies, 1,111 participants. Microneedling alone vs microneedling + PRP. Combination won on scar improvement (MD = -2.91, p < 0.01). Odds of >75% improvement were 2.39x higher with PRP.
So do it with PRP. Microneedling alone is a skincare treatment. Depth matters too, 0.5-1.0mm for texture, 1.5-2.5mm for scars. Uniform shallow passes across the face won't do anything for scars.
Fractional CO2
Thermal injury in columns, collagen remodeling, most effective single modality for overall scar improvement. Also the most downtime and highest side effect risk.
2026 meta-analysis, 7 RCTs, 165 patients. PRP + fractional CO2 vs laser alone. Combination significantly beat monotherapy on excellent improvement (OR = 3.21, p = 0.04) and patient satisfaction (OR = 3.05, p = 0.01). No significant difference in erythema duration, edema duration, or hyperpigmentation incidence, so PRP didn't add adverse events.
Downtime 5-7 days of redness, peeling, swelling. PIH risk is significant in Fitzpatrick IV-VI, which is exactly why PRP gets added. Er:Glass performs comparably with less downtime and lower PIH risk, though CO2 may edge it out on deep scars.
A Realistic Protocol
Network meta-analysis of 56 RCTs, 1,488 patients found combination therapy generally beat monotherapy for moderate-to-severe atrophic scars. Single-modality approaches are the most common mistake.
Months 0-3: TCA cross for icepick every 4-6 weeks. Subcision for rolling every 4-6 weeks.
Months 3-6: microneedling + PRP every 4 weeks for texture, can interleave with cross.
Months 6-12: fractional CO2 or Er:Glass, 1-3 sessions, PRP added to reduce downtime and PIH risk.
Maintenance: occasional microneedling + PRP, tretinoin at home.
6-12 months, not 6-12 weeks. If you're not ready for that timeline, don't start.
Timeline
No treatment removes scars entirely. Multimodality is standard because no single modality does everything. Target 50-80% improvement. Any clinic promising 100% removal is lying.
Mistakes That Come Up Constantly
TL;DR
Clear the acne first. Icepick = TCA cross. Rolling = subcision. Deep boxcar = punch. Texture = microneedling + PRP. Overall resurfacing = fractional CO2 + PRP. Combine modalities or waste your money. 6-12 months, 50-80% improvement. Dermatologist who does this regularly, not a medspa.
Sources
Fix The Acne First
If you're still getting new pimples, stop. Scar treatment while you're actively breaking out is pointless. Every new lesion can make a new scar. You're repairing collagen in one spot while the skin is getting wrecked somewhere else.
Get on a retinoid. Tretinoin or adapalene, whatever your skin tolerates, start it early if you're prone to atrophic scarring. If topicals don't cut it, isotretinoin. Wait until your skin is clear and has been clear for a bit before you spend a dime on scar revision.
That 6 month wait after accutane before lasers? Outdated. There was a split-face RCT comparing concurrent isotretinoin + fractional RF against waiting, and it found no safety difference. Confirm with your derm, but the old rule isn't gospel.
Know What You're Dealing With
Three types of atrophic scars and they need different treatments. Figure out which you have before buying anything.
Icepick: narrow, deep, pitted. Looks like a pen stab. TCA cross or punch excision.
Boxcar: wider, rectangular, sharp edges. Chickenpox look. TCA cross, punch elevation, lasers.
Rolling: wide, shallow, sloping. Fibrous tethers pulling the skin down. Subcision.
Most people have a mix. One treatment won't fix a mixed pattern.
TCA Cross For Icepick
High concentration TCA applied directly into the scar with a needle or fine applicator. Focal injury, collagen remodeling, scar base lifts up.
2026 JCAD review pooled 34 studies, 937 patients. Satisfaction high, improvement 50-80%. Multiple sessions beat single. Higher concentrations raised complication risk. Main adverse event was transient pigment change.
Concentrations in studies range 50-100%, classic protocol is 100%. Some derms drop to 70-90% for darker skin to lower hypopigmentation risk.
Process: cleanse, apply TCA into the scar, neutralize with saline, frost appears. Heals in 7-14 days with a small scab usually. 2-4 sessions, 4-8 weeks apart.
Dermatologist procedure. If a medspa is selling you a "TCA peel" for icepick scars, that's full-face application, completely different. Hypopigmentation risk is real in Fitzpatrick IV-VI. PIH is more common but usually fades.
Subcision For Rolling
Rolling scars are tethered by fibrous bands. No peel or laser releases those. You have to physically cut them.
Needle or cannula goes under the skin, bands get severed, scar lifts, collagen fills in. Blunt cannula has less bruising and hematoma than needle. Compression bandage after reduces hematoma risk.
Bruising and swelling guaranteed, 3-7 days minimum. Lifting is immediate, collagen remodeling continues 3-6 months.
Combination matters. The network meta-analysis ranked CO2 laser + subcision and CO2 laser + PRP highest for Goodman-Baron improvement and patient satisfaction. Subcision alone is decent, subcision + filler or PRP is better.
Operator dependent. Ask how many they do per month. Complications include hematoma, nodule, rarely nerve stuff.
Punch Techniques For Deep Scars
Icepick and small boxcar under 3-4mm, punch techniques physically remove the scar.
Excision: punch instrument cuts down to subcut fat, scar removed, single suture. Best for icepick.
Elevation: scar excised but not removed, base lifted and sutured using the scar tissue as graft. Boxcar with healthy base.
Grafting: scar excised, replaced with graft from behind ear. Larger deeper scars.
Surgical, so infection and poor healing possible. Not standalone either. Punch excision creates a new wound that usually needs laser or microneedling to blend. Best results from punch excision + concurrent CO2 resurfacing.
Microneedling: Texture Not Depth
Controlled dermal injury, triggers remodeling. Good for rolling and overall texture. Weak for deep icepick or boxcar.
2026 meta-analysis, 17 studies, 1,111 participants. Microneedling alone vs microneedling + PRP. Combination won on scar improvement (MD = -2.91, p < 0.01). Odds of >75% improvement were 2.39x higher with PRP.
So do it with PRP. Microneedling alone is a skincare treatment. Depth matters too, 0.5-1.0mm for texture, 1.5-2.5mm for scars. Uniform shallow passes across the face won't do anything for scars.
Fractional CO2
Thermal injury in columns, collagen remodeling, most effective single modality for overall scar improvement. Also the most downtime and highest side effect risk.
2026 meta-analysis, 7 RCTs, 165 patients. PRP + fractional CO2 vs laser alone. Combination significantly beat monotherapy on excellent improvement (OR = 3.21, p = 0.04) and patient satisfaction (OR = 3.05, p = 0.01). No significant difference in erythema duration, edema duration, or hyperpigmentation incidence, so PRP didn't add adverse events.
Downtime 5-7 days of redness, peeling, swelling. PIH risk is significant in Fitzpatrick IV-VI, which is exactly why PRP gets added. Er:Glass performs comparably with less downtime and lower PIH risk, though CO2 may edge it out on deep scars.
A Realistic Protocol
Network meta-analysis of 56 RCTs, 1,488 patients found combination therapy generally beat monotherapy for moderate-to-severe atrophic scars. Single-modality approaches are the most common mistake.
Months 0-3: TCA cross for icepick every 4-6 weeks. Subcision for rolling every 4-6 weeks.
Months 3-6: microneedling + PRP every 4 weeks for texture, can interleave with cross.
Months 6-12: fractional CO2 or Er:Glass, 1-3 sessions, PRP added to reduce downtime and PIH risk.
Maintenance: occasional microneedling + PRP, tretinoin at home.
6-12 months, not 6-12 weeks. If you're not ready for that timeline, don't start.
Timeline
- Weeks 1-4: CROSS scabs heal, subcision bruising resolves. Minimal visible change.
- Months 2-3: Early collagen remodeling. Icepick bases lift slightly, rolling scars flatten a bit.
- Months 4-6: Visible improvement. Texture better, scars shallower.
- Months 6-12: Final result. If you're unhappy at 12 months you've either hit the ceiling for your skin or need a different combination.
No treatment removes scars entirely. Multimodality is standard because no single modality does everything. Target 50-80% improvement. Any clinic promising 100% removal is lying.
Mistakes That Come Up Constantly
- Treating scars while still breaking out. Fix the acne first.
- Single modality and expecting results. Combination is the standard for a reason.
- Medspa TCA "peels" sold as cross. Not the same procedure.
- Microneedling alone on deep icepick scars. Wrong tool.
- Skipping PRP with microneedling or CO2. Data is clear on this one.
- Ignoring Fitzpatrick type. CO2 on darker skin without PIH mitigation is asking for trouble.
- Stopping tretinoin before treatment. It primes the skin and helps healing unless your derm says otherwise.
- Expecting 100%. You'll be disappointed.
- Non-specialist doing the work. Acne scar revision is a dermatology subspecialty.
TL;DR
Clear the acne first. Icepick = TCA cross. Rolling = subcision. Deep boxcar = punch. Texture = microneedling + PRP. Overall resurfacing = fractional CO2 + PRP. Combine modalities or waste your money. 6-12 months, 50-80% improvement. Dermatologist who does this regularly, not a medspa.
Sources
- TCA cross review, 34 studies, 937 patients (JCAD 2026)
- Microneedling + PRP meta-analysis, 17 studies, 1111 patients (2026)
- PRP + fractional CO2 meta-analysis, 7 RCTs, 165 patients (2026)
- Network meta-analysis, 56 RCTs, 1488 patients (2026)
- Subcision for atrophic acne scarring, comprehensive review (2023)
- UpToDate, management of acne scars
