Laser or Chemical Peel for Sun Spots and Age Spots: How They Differ

For ordinary sun spots (solar lentigines), the best evidence so far favours laser over trichloroacetic acid (TCA) peels, but the trials are small, vary in design and do not settle the question for every skin tone or every type of peel. Before comparing the two, make sure the mark is a harmless sun spot. That decision comes first and belongs to a GP, dermatologist or suitably qualified clinician.

As of 5 November 2026, this is based on the sources listed below. It is general information, not a diagnosis or a treatment plan.

First: is it a sun spot?

Sun spots, age spots and liver spots are common names for solar lentigines: flat, harmless pigmented marks that build up on sun-exposed skin over time. DermNet notes they can look similar to an early form of melanoma, so they can be missed, and that biopsy is advised when the diagnosis is uncertain. Treatment is not required unless the mark bothers you. DermNet: solar lentigo

Have a mark checked before any cosmetic treatment if it is new, changing, growing, bleeding, getting darker, has an irregular border or several colours. The Cleveland Clinic gives the same list of reasons to see a provider. Cleveland Clinic: age spots North Bristol NHS Trust's laser service also asks for a GP or dermatologist to confirm a spot is benign before laser. Bristol Laser Centre: age spots

If you are unsure whether you have sun spots, melasma or darker marks left after inflammation, read Melasma, Sun Spots or Post-Inflammatory Pigmentation? first. The peel-versus-laser choice is different for each.

How the two treatments differ

	Laser	Chemical peel
What it does	Pigment-targeting light is absorbed by the dark spot, and the body clears the treated pigment over the following weeks.	An acid solution removes outer skin layers; the skin that replaces them is expected to be more even. Strength and depth vary widely.
Targeting	Can be aimed at individual marks.	Often applied over an area, though some clinics use focal "spot" peels.
Typical recovery	Treated spots can darken and flake. The length depends on the device and settings, so ask your practitioner.	Depends on the depth of the peel: superficial peels have little recovery, deeper ones involve more. Ask for the specific recovery for the exact peel.
Main risks (all treatments that injure skin)	Paler or darker patches, usually temporary but sometimes long-lasting; more likely with a suntan.	Pigment change, irritation and, with deeper peels, a higher risk of marks and infection. Higher caution for darker skin.
Needs a practitioner who	Chooses device and settings for your skin and mark.	Chooses the acid, strength, depth and any skin preparation.

The recovery and risk statements above are general. They are not a protocol, and the details depend on the device, the peel and your skin.

What the evidence shows

Laser has the more consistent trial support. A 2025 systematic review in the Journal of Cosmetic Dermatology covered 41 trials with 3,234 patients (searches to December 2023). It concluded laser therapy appears more effective than the other approaches studied, with an acceptable safety profile, while cryotherapy and TCA peels gave more variable results. The authors call for larger randomised trials. Mardani et al., 2025

One head-to-head trial found laser better than a TCA peel. In a split-hand randomised trial of 45 patients, one hand had a Q-switched 532 nm laser and the other a 35% TCA peel, over three sessions four weeks apart. The laser produced significantly better lightening and patient satisfaction. Post-inflammatory hyperpigmentation was rare, occurring in one patient in each group. Journal of Cosmetic Dermatology, 2022

What these results do not tell you.

• The trial used one laser (a 532 nm Q-switched device) and one peel (35% TCA on the back of the hands). It cannot be applied to every laser or every peel, or to the face.
• Other peel formulations, strengths and combinations are used in practice. Better-designed trials are still needed.
• The review's authors report that combining lasers with certain topical treatments may improve results and reduce pigment change, which suggests the choice is not always one or the other.
• A treatment that works in a trial population may not behave identically on your skin.

Do not read any figure here as the chance that your spots will clear.

Skin tone and recent sun matter more than the label on the treatment

Both laser and peels can leave pale or dark patches. DermNet notes that destructive treatments such as laser and cryotherapy can leave pale or dark spots, which may be temporary or permanent. North Bristol NHS Trust says side effects are more likely with a suntan, and that laser may not suit very dark skin. Progen's pigmentation page currently describes laser treatment for fair to light skin tones (Fitzpatrick I to III) that are not prone to hyperpigmentation, and says recently tanned skin cannot be treated.

If your skin tone, tanning habits or history of dark marks after spots, burns or procedures raises the risk, tell whoever assesses you. They will choose between options, including declining some of them.

Sun protection decides how long results last

Sun spots come from ultraviolet exposure. DermNet advises strict sun protection after treatment to prevent recurrence and the development of new spots, and North Bristol NHS Trust notes that treated spots sometimes return after a few years. Neither laser nor peel is a one-off fix. The AAD advises broad-spectrum SPF 30 or higher, reapplied through the day, and shade or covering in strong midday sun. AAD: fade dark spots

Questions worth asking at a consultation

1. Has this mark been identified as a harmless sun spot, and by whom?
2. Which treatment do you recommend for my skin tone, and why?
3. What will the area look like in the days after, and how long does that last?
4. What would count as a problem, and who do I contact?
5. How many sessions are likely, and what happens if the spot comes back?
6. What do I need to avoid beforehand, including tanning?

Where Progen fits

Progen's pigmentation page describes laser treatment of freckles, sun spots and age spots with a Candela GentleMax Pro Plus in Bournemouth, with suitability, risks and aftercare discussed before treatment. That page does not describe chemical peels, and this article does not suggest Progen offers them. If a peel looks more suitable for you, a GP or dermatologist can advise on options.

Read Progen's laser pigmentation treatment information, or contact the Bournemouth team to ask whether a consultation suits your marks. Please keep photographs and medical history out of the first general enquiry unless the clinic asks for them.

Frequently asked questions

Is laser or a chemical peel better for sun spots?

For ordinary sun spots, a 2025 systematic review found laser appeared more effective than other approaches, and one split-hand trial found a Q-switched laser better than a 35% TCA peel. The trials are small and varied, so the right choice depends on the mark, your skin tone and a practitioner's assessment.

Can a chemical peel remove sun spots?

Peels are used for sun spots and some can lighten them, but trial results for TCA peels were more variable than for laser. Deeper peels carry more risk of pigment change, so ask about the specific peel and your skin tone.

Do sun spots come back after treatment?

They can. DermNet says strict sun protection is needed to prevent recurrence and new spots, and North Bristol NHS Trust notes spots sometimes return after a few years.

Should I get a dark spot checked before laser or a peel?

Yes, if it is new, changing, growing, bleeding or has an irregular border. Sun spots can resemble early melanoma, so a GP or dermatologist should check uncertain marks before cosmetic treatment.

Read Progen's laser pigmentation treatment information

Sources and further information

• Mardani et al., J Cosmet Dermatol 2025;24(4):e70133; accessed 2026-11-05 via Europe PMC record. 41 trials, 3,234 patients, searches to 7 Dec 2023. Laser appears more effective than other modalities with acceptable safety; cryotherapy and TCA peels more variable; combining laser with some topicals may improve results; larger randomised trials needed.
• J Cosmet Dermatol 2022; accessed 2026-11-05 via Europe PMC record. Assessor-blind split-hand RCT, 45 patients: 532 nm Q-switched laser vs 35% TCA peel on solar lentigines of the hands, three sessions four weeks apart. Laser gave significantly better lightening and satisfaction; PIH in one patient per group.
• DermNet, last reviewed November 2025; accessed 2026-11-05. Definition; benign but can resemble melanoma in situ; biopsy if uncertain; treatment not required unless cosmetic; options include cryotherapy, lasers, IPL, peels and topicals; destructive treatments can leave pale or dark spots; sun protection prevents recurrence.
• North Bristol NHS Trust, April 2025 edition; accessed 2026-11-05. Benign check before laser; usually 2-3 sessions; pale or dark patches possible; suntan raises side-effect risk; may not suit very dark skin; spots may return after a few years.
• Cleveland Clinic, last updated 17 Aug 2021; accessed 2026-11-05. Reasons to see a provider: bleeding, colour change or darkening, irregular border, growth.
• American Academy of Dermatology; accessed 2026-11-05. Broad-spectrum SPF 30 or higher, reapplication, avoiding strong midday sun.
• Progen treatment page (read from the site content file, accessed 2026-11-05). Candela GentleMax Pro Plus laser for freckles, sun spots and age spots; fair to light skin (Fitzpatrick I-III) not prone to hyperpigmentation; recently tanned skin cannot be treated; no chemical peels described.