Tattoo removal has its own vocabulary. Some of it comes from dermatology, some from laser physics, some from the tattoo industry itself, and some from the specialized world of removal practice. Walking into a consultation without knowing the terminology can feel like trying to read a contract in a language you only half-speak. This glossary covers the terms you’re most likely to encounter, with brief, plain explanations.
A
Adjunct treatment — Any therapy used alongside laser tattoo removal to enhance results. Microneedling, PFD patches, and topical immune modulators are all examples.
Alexandrite laser — A laser using an alexandrite crystal as the active medium, typically operating at 755 nm. Useful for green and blue inks.
Atrophic scarring — A type of scarring where the skin appears slightly depressed below the surrounding tissue. A possible complication of aggressive tattoo removal.
B
Blistering — Formation of fluid-filled bubbles on the skin, sometimes occurring within hours of a laser session. Usually a sign of moderate skin trauma; resolves over a few days but should be reported to the practitioner.
Bunching — A patient slang term for the appearance of fragmented ink that has gathered in small clusters during the clearance phase, sometimes visible as small dark dots.
C
Cover-up — A new tattoo applied over an existing one to disguise it. In a removal context, partial removal is often used to fade a tattoo enough for a successful cover-up.
Chromophore — Any substance that absorbs light at specific wavelengths. In tattoo removal, the ink particles act as chromophores, absorbing the laser’s energy.
Clearance — The biological process by which fragmented ink is removed from the skin by the immune and lymphatic systems. Distinct from the laser’s role of fragmenting the ink.
D
Dermis — The second layer of skin, beneath the epidermis. Tattoo ink is deposited in the dermis, which is why it’s permanent — and why removal requires reaching this depth.
Dermabrasion — A mechanical resurfacing technique using a rotating abrasive instrument to remove layers of skin. Largely replaced by laser methods for tattoo removal but still occasionally used.
Diffusion — The spreading of ink particles in the dermis, partially due to natural processes and partly accelerated by laser fragmentation. Excessive diffusion can cause a tattoo to appear blurred.
E
Enlighten — A specific brand of picosecond/nanosecond combination laser made by Cutera, offering 1064 nm, 670 nm, and 532 nm wavelengths.
Epidermis — The outer layer of skin. Tattoo removal lasers pass through the epidermis to reach the ink in the dermis below.
Erbium laser — A laser using erbium as the active medium. Used in some skin resurfacing applications, less commonly in primary tattoo removal.
Excision — Surgical removal of tattooed tissue. Reserved for small tattoos or for residual patches after laser treatment.
F
Fading — Visible reduction in the intensity or visibility of a tattoo, whether from natural processes, laser treatment, or other interventions.
Fitzpatrick scale — A classification of skin types from I (very pale, always burns) to VI (very dark, never burns). Used to predict laser response and pigmentation risks.
Fluence — The amount of energy a laser delivers per unit area, typically measured in joules per square centimeter (J/cm²). Higher fluence generally means more aggressive treatment.
Fractional laser — A laser that delivers energy in tiny, separate columns rather than as a continuous beam, allowing controlled treatment with reduced overall skin trauma. Used as an adjunct in some tattoo removal protocols.
Frosting — The temporary white appearance of skin immediately after a laser pass, caused by tiny gas bubbles in the dermis. A common sign that the laser is interacting with the ink.
G
Ghost image — A faint residual outline of a tattoo that remains after the bulk of the ink has been cleared. Common at the end of removal courses, particularly for resistant tattoos.
Granuloma — A localized cluster of immune cells responding to ink particles. Can develop in some patients during or after tattoo removal, sometimes requiring additional treatment.
H
Hyperpigmentation — Darkening of the skin, particularly post-inflammatory hyperpigmentation that can occur after tattoo removal, especially in darker skin types. Usually resolves over months.
Hypopigmentation — Lightening of the skin in the treated area, caused by damage to or temporary suppression of melanocytes. Can be temporary or permanent.
I
Imiquimod — A topical immune modulator sometimes used as an adjunct to tattoo removal in research and clinical settings.
Ink load — The total amount of pigment in a given area of tattoo. Higher ink load (more saturated tattoos) generally requires more sessions.
Intradermal — Within the dermis. Tattoo ink is intradermal.
J
Joule — A unit of energy. Laser energy is often measured in millijoules (mJ) per pulse, with fluence expressed in J/cm².
K
Keloid — A type of raised, thickened scar that extends beyond the original injury. People with a tendency to keloid formation are at higher risk during tattoo removal and should mention this history to their practitioner.
Keratinocyte — The primary cell type of the epidermis. Generally not involved in tattoo permanence but does influence skin healing.
L
Laser hair removal — A different procedure using different parameters, sometimes confused with tattoo removal. The technologies overlap but the protocols and equipment differ.
Lymphatic system — The network of vessels and nodes that filter and transport fluid, immune cells, and debris through the body. Critical for clearing fragmented ink after laser sessions.
Lymphedema — Localized swelling caused by impaired lymphatic drainage. Can affect tattoo removal in affected areas by slowing clearance.
M
Macrophage — A type of white blood cell responsible for engulfing and processing foreign material, including ink particles. Central to both tattoo permanence and tattoo removal.
Melanin — The pigment that gives skin its color. Melanin can absorb laser energy at certain wavelengths, which is why darker skin types require more careful laser parameter selection.
Melanocyte — The skin cell responsible for producing melanin. Damage to melanocytes can cause hypopigmentation.
Microneedling — A procedure using fine needles to create controlled micro-injuries to the skin. Used as an adjunct to tattoo removal to potentially accelerate fading.
N
Nd:YAG — Neodymium-doped yttrium aluminum garnet, the active medium in many tattoo removal lasers. Operates at 1064 nm, with frequency-doubled output at 532 nm.
Nanosecond — One billionth of a second. Q-switched lasers deliver pulses lasting nanoseconds.
Numbing cream — Topical anesthetic applied before laser sessions to reduce discomfort. Common preparations include lidocaine and prilocaine.
P
Patch test — A small, controlled laser exposure to test the tattoo’s response before committing to full treatment. Particularly important for cosmetic tattoos and tattoos with red, pink, or skin-tone pigments.
PFD patch — A perfluorodecalin-saturated silicone patch used to dissipate frosting and allow rapid multi-pass laser treatment.
Photoacoustic effect — The mechanism by which very short laser pulses generate a shockwave that mechanically shatters ink particles. The dominant mechanism in picosecond laser treatment.
Photothermal effect — The mechanism by which laser energy heats and rapidly expands ink particles, fracturing them. The dominant mechanism in nanosecond (Q-switched) laser treatment.
Picosecond — One trillionth of a second. Picosecond lasers deliver pulses approximately 1,000 times shorter than Q-switched lasers.
PicoSure — A specific brand of picosecond laser made by Cynosure, primarily operating at 755 nm. Known for effectiveness on green and blue inks.
PicoWay — A specific brand of picosecond laser made by Candela, offering 1064 nm, 532 nm, and 785 nm wavelengths.
Pigment — The colored substance in tattoo ink. Pigments can be inorganic (metallic compounds) or organic (carbon-based dyes), with different removal characteristics.
Plateau — A point in tattoo removal at which visible fading has slowed or stopped despite ongoing treatment.
Post-inflammatory hyperpigmentation (PIH) — Darkening of the skin following inflammation or injury. A common temporary side effect of laser tattoo removal, especially in darker skin types.
Pulse duration — The length of time the laser fires for each pulse. Measured in nanoseconds for Q-switched lasers and picoseconds for picosecond lasers.
Q
Q-switched laser — A laser that uses an electro-optic shutter to deliver very short, high-energy pulses. The standard tattoo removal technology before picosecond lasers were introduced and still widely used.
R
R0 method — A multi-pass laser protocol using PFD patches to allow rapid successive passes within a single session, eliminating the wait time required by R20.
R20 method — A multi-pass laser protocol delivering four passes in a single session, with 20-minute waits between passes to allow frosting to dissipate naturally.
Reticular dermis — The deeper layer of the dermis, where some tattoo ink is deposited. Generally harder to treat than ink in the more superficial papillary dermis.
Ruby laser — A laser using a ruby crystal as the active medium, operating at 694 nm. One of the earliest tattoo removal laser types; still used for some applications.
S
Salabrasion — An older method of tattoo removal involving rubbing salt into abraded skin. Largely abandoned due to scarring risks and incomplete results.
Saline removal — A non-laser method using saline solution tattooed into the skin to draw ink up through the epidermis. Used primarily for permanent makeup removal.
Selective photothermolysis — The principle that allows lasers to target specific tissue components while sparing surrounding tissue, by matching laser wavelength and pulse duration to the target’s absorption properties.
Skin grafting — Replacing damaged skin with skin transplanted from another body site. Reserved for very large tattoos undergoing surgical excision.
T
Test spot — A small area treated with the laser before committing to full tattoo treatment. Used to assess skin response and predict treatment behavior.
Titanium dioxide — A white pigment commonly used in tattoo inks, especially in pastels and skin-tone shades. Notable for its resistance to laser removal and tendency to darken paradoxically under laser exposure.
Treatment plateau — See “plateau.”
Trichloroacetic acid (TCA) — A chemical exfoliant used in some chemical peel approaches to tattoo removal. Generally considered ineffective for true removal and risky due to scarring potential.
U
UV-reactive ink — Tattoo ink containing fluorescent compounds visible under ultraviolet light. Notoriously difficult to remove because the fluorescent components don’t absorb tattoo removal laser wavelengths well.
V
Vehicle — The liquid carrier in tattoo ink (typically water, glycerin, witch hazel, or alcohol-based) that holds the pigment particles. Generally not relevant to removal but can affect ink behavior during application.
Vegan ink — Tattoo ink formulated without animal-derived ingredients. Removal characteristics vary by specific formulation; the term itself doesn’t predict laser response.
W
Wavelength — The specific color of light a laser produces, measured in nanometers (nm). Different wavelengths target different ink colors. Common tattoo removal wavelengths include 1064 nm, 755 nm, 694 nm, and 532 nm.
White ink — Tattoo ink based primarily on titanium dioxide. One of the most difficult inks to remove; can darken paradoxically under laser exposure.
Z
Zimmer cooler — A cold air blower used during laser sessions to cool the skin and reduce discomfort. Standard equipment at most modern removal clinics.
If you encounter a term during treatment that isn’t covered here, ask the practitioner directly. Tattoo removal involves enough specialized vocabulary that needing a definition is normal. Understanding the language makes it easier to follow a treatment plan and ask good questions.
A note on this guide
Tattoo Takeoff is an independent, research-based resource. It is not a clinic and does not perform removal, and nothing here is medical advice. For anything specific to your skin, ink, or health, consult a qualified, licensed professional.
Last reviewed: June 15, 2026. Updated as we add terms.