Laser tattoo removal works by breaking ink into pieces your immune system can carry away. The laser does not vacuum pigment out of the skin. It fires a pulse short enough to shatter the particles, and macrophages spend the next several weeks hauling the fragments into the lymphatic system. That is the whole mechanism.
The ink stays put because the pieces are too big
Tattoo ink sits roughly one to two millimetres down, in the dermis. The particles are too large for immune cells to pick up, which is why a tattoo does not fade the way a bruise does. The pigment is not special. It is just too big to move.
A Q-switched laser pulses in nanoseconds. A picosecond laser pulses in trillionths of a second. Both are far shorter than the tissue’s thermal relaxation time, so the particle fractures while the surrounding dermis is largely spared. Clearance after that depends on blood supply and immune response, which is why two people with the same tattoo do not finish on the same calendar.
Frosting is the endpoint, not a burn
Right after a shot, the tattoo often turns white. That frosting is carbon dioxide gas released in the treated tissue. It fades in about 10 to 20 minutes. Operators treat to that white bloom because it is the standard visual endpoint of a pass. It looks dramatic. It is expected.
Wavelengths match colour, not a slogan
Black ink absorbs broadly and is the easiest colour to treat. Other colours need a wavelength the pigment actually absorbs. A clinic with one wavelength can clear a black line tattoo and still stall on teal.
| Wavelength | Best on | What changes the plan |
|---|---|---|
| 1064 nm Nd:YAG | Black, dark blue | Deepest penetration and the least melanin absorption, so it is the safer default on Fitzpatrick IV, V, and VI. |
| 532 nm | Red, orange, yellow, warm browns | High melanin absorption, which raises hypopigmentation risk on darker skin. |
| 755 nm alexandrite | Green, teal, blue | The usual answer to the green problem. Without it, those colours sit there. |
| 694 nm ruby | Green, blue | Older technology, with a higher hypopigmentation risk than newer pulses. |
Green, teal, and light blue are the hard colours in ordinary body ink. Yellow and white are often effectively untreatable. Selling sessions into white ink is not an honest consult.
Ink vintage matters as much as colour. A 1990s amateur or homemade tattoo is usually shallow and sparse, and it often moves in a handful of visits. A saturated professional colour piece from about 2015 onward, the kind still walking around Southside and Northshore, is dense and layered. Same city, completely different job. If the tattoo is already a cover-up on top of older ink, layering adds still more sessions. That factor is spelled out in how many sessions you will need.
Picosecond is better, and it is not magic
Split-tattoo studies have shown better clearing in about 75 percent of tattoos with picosecond pulses versus nanosecond pulses after four treatments. The shorter pulse is more photomechanical and less photothermal, which generally means fewer sessions and a lower risk of hypopigmentation and scarring. That margin matters more as Fitzpatrick type goes up.
Picosecond treatment can compress a ten-session job toward maybe six to eight. It does not turn that job into two visits. “Gone in three” is a sales line. This site does not name a laser model. Ask which wavelengths a clinic can fire, especially for green and teal, before you compare prices. That conversation continues in how to choose a clinic.
Spacing is the treatment
Typical complete removal is 6 to 12 sessions, spaced 6 to 12 weeks apart, over 12 to 24 months. Longer gaps, around 10 to 12 weeks, generally clear more ink per visit than coming back at four weeks, because immune cleanup is the slow step. A clinic that books you every four weeks is selling extra sessions, not a faster result.
Fading for a cover-up is a different endpoint. You only need the old ink light enough for a new design to hold. That is usually 3 to 5 sessions over three to six months, at roughly 40 percent of the cost of chasing bare skin. The local price bands are in what tattoo removal costs in Chattanooga.
A Valley summer changes the fluence
Chattanooga is humid subtropical. Humidity sits around 75 to 80 percent all year. June and July push the UV index to 11, with a burn time around ten minutes. July is the brightest month, near 317 sunshine hours, and summer highs run about 88°F.
Treated skin cannot be tanned or sunburned at the appointment. Epidermal melanin competes with the ink, so a tan forces a weaker treatment or a higher risk of burns and pigment change. Protect that skin from the sun for at least four weeks. Start in September or October and you can bank three or four sessions from October through March. Start in May and you spend the hot months covered up or skipping visits. Weekends on Chickamauga Lake, the Tennessee River, and Chester Frost Park are a normal June here, so plan the season before the package. Sweat and dressings for the first month are in aftercare in a humid climate.
What should be said before session one
Pigment changes happen. They are often temporary and they can last. Blistering in the first 24 to 72 hours is common, not a complication by itself. Scarring is uncommon with correct settings, and the risk rises with over-treatment, picked scabs, and darker skin. Ghosting, a faint shadow or texture where the tattoo sat, is common once the pigment is gone, and it is permanent. A small share of tattoos also plateau. “Complete” means as close as the ink allows, not a warranty.
Wait if the skin is tanned or sunburned, if you have taken isotretinoin in the past six months, if you are pregnant or breastfeeding, if the site is infected, or if the tattoo is under six to eight weeks old. A keloid history calls for caution, not a default yes.
Cosmetic pigments are a separate problem. Iron oxide and titanium dioxide in brows, liner, and lips can turn grey or black under a laser. The first step is a test spot, covered on eyebrow tattoo removal, microblading removal, and permanent makeup removal.
For body ink, choose between complete removal and fading for a cover-up in the consult, not from a twelve-session package. Laser tattoo removal is the overview. The homepage is the short version.