Laser, IPL, or Cryotherapy for Age Spots: What Actually Separates the Three

Solar lentigines, the flat brown spots most people call age spots, are not stains sitting on the skin. They are localized zones where sun exposure has changed the behavior of pigment producing cells. Melanocytes in these patches make more melanin, and the surrounding keratinocytes hold onto that pigment longer than normal skin does. Any treatment that works has to remove or destroy that concentrated pigment, and ideally reset the overactive local biology without damaging everything around it.

Three in-office options dominate this space: pigment targeted lasers, intense pulsed light, and cryotherapy. They are often discussed as if they were interchangeable. Mechanistically, they are not, and the differences matter most for people with medium to deep skin tones.

How pigment lasers work. Q-switched and picosecond lasers deliver extremely short pulses of light at wavelengths that melanin absorbs strongly, commonly 532, 694, 755, or 1064 nanometers. The pulse is shorter than the time it takes heat to spread out of the pigment particle, a principle called selective photothermolysis. The melanin heats and fractures almost instantly while surrounding tissue stays relatively cool. Over the following days the spot darkens, crusts lightly, and flakes off. For a discrete, well defined lentigo, a single session often clears 70 to 90 percent of the visible pigment, though clinicians frequently plan for one to three sessions.

How IPL works. Intense pulsed light is not a laser. It is a broadband flash lamp emitting a range of wavelengths, filtered to favor those absorbed by melanin and hemoglobin. Pulses are longer and less selective than laser pulses, so IPL heats pigment more gently across a larger area. That makes it well suited to diffuse sun damage, meaning dozens of faint spots plus background redness across the cheeks, rather than one or two dark lesions. Expect a series, typically three to five sessions spaced about a month apart. Individual dark lentigines often respond less completely to IPL than to a pigment laser, precisely because the energy is spread rather than concentrated.

How cryotherapy works. Liquid nitrogen destroys tissue by freezing it. Melanocytes happen to be more sensitive to cold injury than surrounding keratinocytes, which is why a brief, carefully timed freeze can eliminate a lentigo. It is fast, inexpensive, and widely available. The tradeoff is precision. Freezing is harder to titrate than light. Overtreatment can kill too many melanocytes and leave a permanent white spot, called hypopigmentation, or trigger the opposite problem, a dark inflammatory mark. Studies comparing cryotherapy to pigment lasers on lentigines generally find lasers clear spots more reliably with fewer pigment complications, though cryotherapy performs respectably on lighter skin.

The skin tone question. This is the single most important variable, and it cuts across all three modalities. Melanin does not know whether it sits in an age spot or in normal skin. In deeper skin tones, the background melanin competes for the treatment energy, raising the risk of burns, post inflammatory hyperpigmentation, and light patches. Longer wavelengths such as 1064 nanometers penetrate past much of the epidermal melanin and are generally considered the safer laser choice for darker skin. IPL is used cautiously or avoided in the deepest skin tones. Cryotherapy carries a meaningful hypopigmentation risk in richly pigmented skin because of how cold sensitive melanocytes are. A test spot, a small treated area evaluated a few weeks later, is a reasonable request for anyone with medium or deep skin.

The step nobody should skip. Before any of these treatments, the lesion needs to be confirmed as a benign lentigo. Lentigo maligna, an early form of melanoma, can look remarkably similar: flat, brown, irregular, on sun exposed skin. Destroying it with a laser or freeze removes the visible marker without removing the disease. A spot that has changed shape, developed multiple shades, grown, or looks different from its neighbors warrants evaluation, sometimes with dermoscopy or biopsy, before anyone points an energy device at it.

What none of these treatments do. They remove pigment that already exists. They do not change the underlying tendency of that skin to produce spots, which was set by decades of ultraviolet exposure. Without daily broad spectrum sunscreen, spots commonly return in the same regions within one to two years. Some clinicians add topical retinoids or other pigment regulating agents after treatment to slow recurrence, but sun protection is the intervention with the strongest mechanistic case.

A rough decision framework. One or a few distinct dark spots on lighter skin: a pigment laser is usually the most efficient path. Widespread mottled sun damage with redness: IPL addresses the whole picture. Limited budget, lighter skin, and a straightforward lesion already examined by a clinician: cryotherapy is defensible. Medium to deep skin tone: prioritize a provider experienced with your skin type, favor longer wavelengths, and ask about a test spot.

No single option wins across the board. The right choice depends on how many spots you have, how dark they are, what your baseline skin tone is, and whether anyone has actually looked closely at the lesion first. That last part is not optional.

Related reading: Laser, IPL, or Cryotherapy for Age Spots: What the Mechanisms Actually Predict.