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Cortisone Injection vs Glycolic Acid Peel

Cortisone Injection: A tiny shot of diluted steroid into one inflamed acne cyst. It flattens that spot in a few days. It treats the bump, not the acne.

Glycolic Acid Peel: A chemical peel that uses glycolic acid, the smallest of the fruit acids. It brightens dull skin, softens rough texture and fades flat brown marks. It works on the surface only, and it has to be neutralized on time.

Reviewed by Dr. Schwarz, Board-Certified Dermatologist
Last updated: 10/22/2026
Editorial illustration for Cortisone Injection, based on the entry’s treatment or equipment reference.Editorial illustration for Glycolic Acid Peel, based on the entry’s treatment or equipment reference.
Choose ifKey differencesWhat is it?What it treatsTreatment areasSkin tonesHow it worksBefore your treatmentDay of treatmentAfter your treatmentRisksCostQuestionsRelated

Choose Cortisone Injection if…

Choose for one painful acne cyst that needs to flatten fast, or for keloids and patchy hair loss.

  • A single painful cyst before an event
  • A raised keloid
  • A patch of alopecia areata

Choose Glycolic Acid Peel if…

Choose to brighten dull skin and fade flat brown marks with little or no downtime.

  • Dull skin or rough texture
  • Flat brown marks or clogged pores
  • You want little downtime
Fine together

Can you have both?

A cortisone injection can calm a single painful cyst at any point in a peel plan.

Key differences

● Cortisone Injection
● Glycolic Acid Peel
DowntimeNone → 2+ weeks
None
1–2 days
PainMinimal → Needs anesthesia or sedation
Mild
Mild
Results showImmediately → 3+ months
Within days
Within days
How long it lastsWeeks → Years or permanent
Weeks
Weeks
Visits neededOne → Every few months
Every few months
A longer series (4–6+)
Cost per visit$ → $$$$$
$
$
ReversibleYes, can be undone → No, permanent
No, permanent
No, fades slowly

What is it?

Cortisone Injection

Glycolic Acid Peel

What is it?

It is injected into a lesion.

An intralesional steroid calms local inflammation or scarring.

It differs from joint injections.

It is not a systemic steroid treatment.

The diagnosis matters.

Infected or uncertain lesions should not be injected.

Side effects can last.

Skin thinning, fat loss and pigment change may persist.

It is a supervised peel.

A glycolic acid peel is an alpha-hydroxy acid exfoliation.

The percentage is not the whole story.

Acidity, contact time and technique matter.

High-strength home use is unsafe.

The FDA warns against unsupervised strong peels.

History matters.

Irritation, recent procedures, herpes and pigment risk are reviewed.

What it treats

Evidence level
Cortisone Injection
Glycolic Acid Peel
Strong evidenceMost established uses
Inflamed acne on light skin. The spots sit in a patch of pink, and the ring of redness around each one is easy to see. A few have a yellow-white head, and the skin between them is dry and flaking.

Acne

Flattens a painful cyst within days.

A raised, smooth, firm scar on the upper chest on light skin. It is shiny pink-red and hairless, and its edges spread well past the small mark it grew from.

Keloids

Softens and flattens raised scars.

A round smooth bald patch on the scalp.

Alopecia Areata

Regrows hair in patches.

Dull Skin on light skin.

Dull Skin

Brightens quickly.

Moderate evidenceSome supportive research
A smooth, dome-shaped lump about two centimetres across on the upper back on pale skin, with a tiny dark pore at its center and faintly pink skin over it.

Epidermal Inclusion Cyst

Calms an inflamed cyst.

Flat tan patches with soft irregular edges across the forehead and upper cheek of an adult with light skin, the surface completely smooth.

Melasma

Helps alongside lightening creams.

Inflamed acne on light skin. The spots sit in a patch of pink, and the ring of redness around each one is easy to see. A few have a yellow-white head, and the skin between them is dry and flaking.

Acne

Clears clogged pores.

AI-generated educational illustration of Sun Spots: 1. Sun Spots Header — Light Skin; Lighter skin. Not a clinical photograph.

Sun Spots

Fades spots with a series.

Not effective
dark keratin plugs in dilated pores on the nose and adjacent left cheek, with the face turned to the person’s right on light skin.

Blackheads

Not for clogged pores.

Ice Pick Scars on light skin.

Ice Pick Scars

Too superficial.

Can make it worse
Acne scarring on light skin. Small sharply cut pits and broad shallow dips across a cheek, several sitting inside faint flat pink marks, with no active spots.

Acne Scarring

Can cause dents in skin.

Redness and fine superficial vessels across a light-skinned cheek and nose.

Rosacea

Stings and triggers flushing.

Treatment areas

Treatment areas

The specific lesion, scar or affected patch determines the treatment site; there is no fixed body distribution.

Face; the selected area depends on the concern and treatment plan.

Skin tones

Skin tone
● Cortisone Injection
● Glycolic Acid Peel
Lighter skin
Low risk
A small dent is possible.
Low risk
Light flaking.
Medium skin
Some risk
Lighter patches can show.
Low risk
Start at lower strengths.
Deeper skin
Some risk
Lightening and dents are more visible; low doses help.
Some risk
Over-strong or over-long peels can leave dark marks; start low.

How it works

Cortisone Injection

Glycolic Acid Peel

How it works
Cortisone Injection mechanism diagram. Medicine is placed in a lesion: A clinician injects an appropriate corticosteroid preparation. Inflammatory signaling decreases: The steroid reduces local immune and inflammatory activity. The lesion may soften or flatten: Response depends on the condition, dose, and placement.
Glycolic Acid Peel mechanism diagram. The peel is applied: A clinician selects the formulation for the skin and goal. Outer cells loosen: Glycolic acid reduces cohesion in the superficial skin layers. The surface renews: Controlled exfoliation can improve selected superficial concerns.
Diagram explanation

Medicine is placed in a lesion: A clinician injects an appropriate corticosteroid preparation. Inflammatory signaling decreases: The steroid reduces local immune and inflammatory activity. The lesion may soften or flatten: Response depends on the condition, dose, and placement.

Schematic illustration. Technique and response vary. This explains a mechanism and does not specify treatment settings.

The peel is applied: A clinician selects the formulation for the skin and goal. Outer cells loosen: Glycolic acid reduces cohesion in the superficial skin layers. The surface renews: Controlled exfoliation can improve selected superficial concerns.

Schematic illustration. Technique and response vary. This explains a mechanism and does not specify treatment settings.

Before your treatment

Cortisone Injection
Glycolic Acid Peel
2–4 weeks before
Not specified

2 weeks before: Sun and tanning: No tanning or sunburn for 2 weeks beforehand, and sunscreen daily.

Pigment cream: On deeper skin tones, and in anyone who marks easily, many providers pre-treat for 2 to 4 weeks with a pigment-blocking cream to lower the chance of dark patches.

Before you book: Events: Do not book a first peel in the days before an event.

The week before

Do not pick: Do not pick, squeeze or heat the spot.

Actives and hair removal: Stop retinoids (tretinoin, adapalene, retinol), benzoyl peroxide and exfoliating acids 3 to 5 days before.

Actives and hair removal: Stop waxing, threading and hair removal creams on the area for a week.

Day of treatment

Cortisone Injection
Glycolic Acid Peel
Before you arrive

Clean skin: Wash your face and skip makeup on the area.

Not specified
Arrival & prep

The provider checks that the spot is an inflamed acne cyst and not a boil.

Skin is checked and usually photographed, and you confirm what you stopped using.

Treatment

The skin is wiped with alcohol.

A very fine needle goes just into the bump and a small amount of fluid goes in, under 10 seconds per spot. The sting is sharp for a few seconds, worse if the cyst is already tender, but most people rate it lower than they expect. Numbing does not help much — the needle stick is the whole procedure.

Skin is cleaned and degreased, eyes and lips protected, and the acid brushed on in a set order.

The provider watches for even pinkness, then neutralizes or floods the skin with water. It takes about 20 to 30 minutes. The sting is hot and prickly, climbs over 2 to 5 minutes, then stops seconds after neutralizing. Say so if it turns to burning, which is the signal to stop early.

Before you leave

A tiny red dot, sometimes a small raised bleb that flattens within an hour.

Pink, tight skin, a bit like mild windburn.

After your treatment

Cortisone Injection
Glycolic Acid Peel
First 24 hours

Days 1 to 2: The bump softens and the ache fades.

Day 1 to 3: Skin feels dry and rough and can look slightly darker before it sheds.

Days 2–7

First few days: A pinprick mark, sometimes a small bruise, fading over a few days.

Days 3 to 7: Most cysts are flat.

Day 3 to 5: Flaking finishes and skin looks brighter underneath.

Weeks 2–4
Not specified

Week 1 to 2: A few spots in the first week or two as clogged pores clear are common, and settle on their own.

Time to results

24–48 hours for a cyst

Within days

How long results last

Treats only that spot

Weeks to months with skincare

Risks

Risks
  • Dent in the skin
  • Lighter patch of skin
  • Visible small vessels
  • Most side effects of a superficial glycolic peel are mild and expected
  • Dark patches
  • Prolonged redness
  • A cold sore outbreak
  • Persistent itching or rash

Cost

Per session

Roughly $50 to $250 per office visit in the US, usually billed as an office visit plus a procedure charge rather than per spot.

In the US a superficial glycolic peel usually runs about $100 to $250 a session, depending on the city, a medical office versus a spa, and whether it is bundled with a facial.

Insurance

Insurance often covers it, since acne cysts count as medical rather than cosmetic.

Insurance does not cover peels done for brightness, texture or post-acne marks.

Questions

Cortisone Injection

Glycolic Acid Peel

Individual Questions
How fast does a cortisone shot work on a cyst?

Softening begins within 24 to 48 hours and most spots are flat by day three to five. That figure traces back to one small 1983 trial — it matches what dermatologists see but has never been tested at scale. The mark left behind takes weeks longer, and the injection does not speed that up.

Will it leave a dent?

It can. A shallow depression happens when the dose is too strong, so a lower concentration is the main protection. It is uncommon — most dermatologists see it in well under one patient in a hundred — and it often fills in over several months. But it is not reliably temporary. About half the clinicians who do see it report it lasting more than six months, and occasionally it is permanent. That is why you ask what concentration is being used.

Can I get one before an event?

Yes, the most common reason people ask. Aim for three to five days ahead so the swelling has time to drop. A same-day injection rarely looks better by that evening.

Does it stop acne from coming back?

No. It treats only the spot it is injected into. Preventing the next cyst needs a daily treatment plan, and the guidelines call this an add-on.

Is it safe on deeper skin tones?

Yes. The risk is a lighter patch at the site, more noticeable and slower to fade on deeper skin tones. A lower concentration reduces it, so ask.

Is this approved for acne?

Not in the United States, strictly speaking. The FDA labeling lists intralesional use for keloids, alopecia areata, discoid lupus and others. Acne is not on it. Off-label use for an acne cyst is routine, legal and recommended by the American Academy of Dermatology, but almost nobody says it out loud. In the UK, NICE withdrew its recommendation in 2026 after UK-licensed triamcinolone injections stopped being available — a supply and licensing decision, not a safety one.

How is a glycolic peel different from a salicylic peel?

Glycolic is water-soluble and works on the surface, so it suits dullness, rough texture and brown marks. Salicylic is oil-soluble and gets inside the pore, so it suits blackheads and whiteheads. Some providers blend the two.

What does neutralizing mean, and why does it matter?

Glycolic keeps working until it is stopped, either with a basic solution or by flooding the skin with water. The provider watches a timer and the skin at the same time. Peels left on too long are how burns happen.

Is a higher percentage better?

Not on its own. The pH and the contact time matter as much as the number. A well-judged 30% peel can do more than a careless 70% one.

Will I actually peel?

Often only lightly, and sometimes not at all. Fine flaking for a day or two is usual, and no flaking does not mean it failed.

How many will I need?

4 to 6 peels, 2 to 4 weeks apart, then maintenance every couple of months. One peel gives roughly a week of brightness.

Can I have one if I use tretinoin?

Yes, and skin on a retinoid usually peels more evenly. Stop it about 3 to 5 days before and restart once flaking has finished.

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