It freezes tissue.
Liquid nitrogen destroys selected tissue through freezing and thawing.
Cryotherapy vs Surgical Excision
Cryotherapy: Liquid nitrogen is sprayed or dabbed onto a spot to freeze and destroy it. It is a standard treatment for warts, precancerous sun spots and some harmless growths. It commonly leaves a pale mark that does not fully come back.
Surgical Excision: The growth is cut out along with a measured border of normal-looking skin, and the wound is stitched closed. The whole piece goes to a laboratory and the result comes back in about a week. The scar is a line, and it is longer than the spot was.
Choose Cryotherapy if…
Choose for quick removal of warts, sun-damage spots or harmless growths — accepting a possible pale mark.
- A wart or rough sun spot
- You want it done in one quick visit
- A pale mark wouldn't bother you
Choose Surgical Excision if…
Choose to remove a skin cancer or suspicious growth completely with lab-checked edges — the scar is a line, longer than the spot.
- Melanoma or a suspicious mole
- Skin cancer on the trunk or limbs
- You want the whole growth checked
Alternatives, not combined
Can you have both?
They suit different problems. Cryotherapy is for small surface spots; excision removes deeper growths and sends them to the lab.
Key differences
● Cryotherapy
● Surgical Excision
DowntimeNone → 2+ weeks
1–2 weeks
1–2 weeks
PainMinimal → Needs anesthesia or sedation
Mild
Mild
Results showImmediately → 3+ months
1–4 weeks
Immediately
How long it lastsWeeks → Years or permanent
Years or permanent
Years or permanent
Visits neededOne → Every few months
A short series (2–3)
One
Cost per visit$ → $$$$$
$
$$
ReversibleYes, can be undone → No, permanent
No, permanent
No, permanent
What is it?
Cryotherapy
Surgical Excision
What is it?
It treats diagnosed lesions.
It is used for benign or precancerous spots.
It leaves no specimen.
Nothing remains for microscopic examination.
Uncertain moles should not be frozen.
A diagnosis is needed first.
It removes a lesion surgically.
A planned incision removes the lesion and a rim of tissue.
It diagnoses or treats.
It provides tissue or removes a known lesion.
Margins depend on the diagnosis.
They should not be chosen from a generic chart.
Mohs is different.
Standard excision and Mohs assess tissue differently.
What it treats
Evidence level
Cryotherapy
Surgical Excision
Strong evidenceMost established uses
Warts
A first-line treatment.
Actinic Keratosis
Clears precancers.
Seborrheic Keratosis
Removes growths.
Basal Cell Carcinoma
High cure rates.
Squamous Cell Carcinoma
Removes the cancer with margins.
Melanoma
The main treatment.
Epidermal Inclusion Cyst
Removes the sac.
Moderate evidenceSome supportive research
Skin Tags
Freezes small tags.
—
Little evidence
Keloids
Injections work better.
Acne Scarring
Punch excision is used for small scars instead.
Not effective
Melanoma
Needs excision.
—
Can make it worse
—
Keloids
Keloids often return larger alone.
Treatment areas
Treatment areas
The specific lesion, scar or affected patch determines the treatment site; there is no fixed body distribution.
The specific lesion, scar or affected patch determines the treatment site; there is no fixed body distribution.
Skin tones
Skin tone
● Cryotherapy
● Surgical Excision
Lighter skin
Some risk
A pale mark may not fully return.
Low risk
A fine line scar.
Medium skin
Some risk
Pale or dark marks are more visible.
Low risk
Scar fades over a year.
Deeper skin
Higher risk
Lasting pale patches are common; ask about alternatives.
Some risk
Raised or keloid scars possible, especially on chest, back and shoulders.
How it works
Cryotherapy
Surgical Excision
How it works
Diagram explanation
A selected lesion is frozen: A clinician applies liquid nitrogen to the treatment area. Cold injures the tissue: A controlled freeze-thaw response damages the target. The treated area sheds and heals: A blister or crust may form; repeat treatment can be needed.
Schematic illustration. Technique and response vary. This explains a mechanism and does not specify treatment settings.
The area is planned: Diagnosis and location guide the removal border and depth. The lesion is cut out: The clinician removes the selected tissue as a specimen. Closure and tissue review follow: The wound heals, while pathology helps guide further care.
Schematic illustration. Technique and response vary. This explains a mechanism and does not specify treatment settings.
Before your treatment
Cryotherapy
Surgical Excision
The week before
A few days before: Thick warts: Soaking and filing the wart with a pumice stone or emery board helps the freeze reach the wart, not the callus on top.
Ask your provider: Several spots: If more than one spot is planned, ask to start with one and see how the skin heals.
Supplements and alcohol: Non-essential blood thinners such as fish oil, vitamin E and ginkgo are commonly stopped about a week before, and alcohol the night before.
Smoking and vaping: Stop for a week before and two weeks after if you can.
Day of treatment
Cryotherapy
Surgical Excision
Before you arrive
Not specified
Eating and clothes: Eat normally and take your usual morning medicines.
Arrival & prep
The spot is examined first — the most important part of the visit.
The site is confirmed against the biopsy report and you point to it yourself.
Treatment
Liquid nitrogen is sprayed or dabbed on until a white frozen halo covers the spot and a small margin.
A sun spot takes seconds; a wart takes longer and is usually thawed and frozen again the same visit. It burns and stings, peaking as the skin thaws, then aches for a few hours. Fingertips, toes, soles and ears are sorest. Brief and unpleasant, not severe.
The surgery: The skin is cleaned and draped.
The surgery: The ellipse is cut out in one piece, bleeding points sealed, and the edges freed so they meet without tension. Closing is in layers — dissolving stitches deep, stitches on the surface. You feel pressure and tugging and hear instruments, but nothing sharp. Most take 20 to 45 minutes, and the site feels tight afterward rather than sore.
Before you leave
Red, swollen and tender, sometimes blistering within the hour.
A dressing, written wound care, a stitch removal appointment, and a plan for how the pathology result reaches you.
After your treatment
Cryotherapy
Surgical Excision
First 24 hours
Days 1 to 3: A clear or blood-filled blister is expected, not a sign anything went wrong.
Not specified
Days 2–7
Days 4 to 14: The blister dries into a dark crust with the growth on top, and lifts off on its own over one to two weeks.
First week: Keep the dressing dry and in place for 24 to 48 hours, then start daily care — gentle wash, petrolatum, non-stick dressing.
Days 5 to 14: Stitches come out — face at 5 to 7 days, trunk and arms at 10 to 14, legs and back sometimes longer.
Weeks 2–4
Weeks 2 to 8: New skin is pink and delicate.
From week 2: The scar is hardest, pinkest and most raised at around three to six weeks.
Time to results
1–3 weeks
Lab result in about a week
How long results last
Permanent for growths; warts may need repeats
Permanent
Risks
Risks
- A pale mark that is not filling back in
- A dark mark
- Numbness or tingling
- A raised or thickened scar
- Hair loss in the treated patch
- Still not healed after 4 weeks
- The growth is back or never went
- A thick, raised or widening scar
- Numbness or a firm cord under the skin
- A stitch that surfaces months later
- A margin that was not clear
- A pucker at one end of the line
- When to contact your provider
Cost
Per session
Cosmetic prices vary a lot and are usually quoted per lesion or per visit, cheaper per spot when several are done at once.
An excision costs more than a scrape-and-burn and less than Mohs surgery.
Insurance
In the US, freezing warts and precancerous sun spots is billed as medical treatment, so you pay your copay or whatever the deductible has not covered.
In the US the surgical charge is priced by the size of the excision and the body site, with a separate charge for a more complex layered closure.
Questions
Cryotherapy
Surgical Excision
Individual Questions
Does freezing leave a white mark?
Often. Pigment cells die at milder cold than the growth, so most effective freezes take some color out. Some returns over months; a good part does not. The mark is usually a little wider than the spot and stands out far more on deeper skin tones — worth discussing before you agree.
Can a mole be frozen off?
No. Freezing destroys the tissue without a diagnosis, so a skin cancer can heal over at the surface while it keeps growing underneath. Anything pigmented, new or changing gets examined and sampled, and moles that need removing are cut out and sent to a laboratory. Same for at-home freezing and mole removal pens.
How much does it hurt?
A sharp burning sting for ten to thirty seconds during the freeze and the thaw, then an ache for a few hours. Fingers, toes, soles and ears are worst. Brief and genuinely unpleasant rather than severe, and ordinary painkillers are enough.
Is the blister normal, and should I pop it?
Normal, and it is how the treatment works — the skin separates and lifts the growth off with the blister roof. Leave it alone and cover it. If it is large, tense and painful, the clinic can drain it, which beats tearing the roof off yourself.
How many treatments will my wart need?
Usually several, every two to four weeks. Many clear over three to six treatments, some need more, and some never respond. Salicylic acid at home in between improves the odds. If nothing has changed after three or four sessions, ask about a different approach.
Are the drugstore freeze kits the same as what a doctor uses?
No. They use a propellant gas much warmer than liquid nitrogen and harder to aim, so they are weaker on thick and plantar warts. They can still blister and leave a pale mark. Not for the face, and never on a mole or an unexamined spot.
Why is the scar so much longer than the spot?
Because a round hole cannot be closed flat. The piece taken out is an ellipse roughly three times as long as it is wide, so the edges meet evenly instead of puckering at each end. A spot the size of a pencil eraser becomes a line an inch or more long. It is geometry, not technique, and no surgeon avoids it.
How long until I get the result?
Usually 3 to 10 days, depending on the laboratory. Ask before you leave how and when you will be told, and call if you have heard nothing after about two weeks.
What happens if the margins are not clear?
A further procedure — a re-excision with a wider border, or a referral for Mohs surgery — usually within a few weeks. It is not a mistake. It is the reason the specimen went to a laboratory in the first place.
When can I exercise again?
About 2 weeks for most sites, longer for the back, shoulder and shin. The visible stitches come out sooner, and the deep stitches are still carrying the tension. Lifting or straining is what stretches or splits a wound.
Should I have Mohs surgery instead?
On the face, particularly the nose, eyelids, ears and lips, or for a tumor that is large, has vague borders, has an aggressive subtype on the biopsy, or has come back before, Mohs is often better. For a small low-risk cancer on the trunk or limbs, an excision achieves the same result in a fraction of the time and cost. Ask which category yours is in.
Will the scar fade?
It flattens and pales substantially over about a year, with most of the change in the first six months. Keeping it out of the sun and using silicone gel or sheeting once it is closed are the two things with reasonable evidence behind them. Scars on the chest, shoulders and upper back stay red and raised longest and are the likeliest to widen.
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