Actinic Keratosis
Actinic keratosis (AK) is a rough, scaly patch of skin caused by years of cumulative sun damage. It’s the most common precancerous skin condition in the United States, and while a single AK carries a modest risk of progressing to skin cancer, that risk climbs the more lesions you have. At Genesis Dermatology in Jupiter, FL, board-certified dermatologists treat actinic keratosis to reduce your long-term skin cancer risk, often before it becomes anything more serious.
What Is Actinic Keratosis?
Actinic keratosis develops when UV exposure damages the DNA of skin cells over time, causing them to grow abnormally on the skin’s surface. It’s considered precancerous, meaning it isn’t cancer yet, but it represents an early step in the same process that can lead to squamous cell carcinoma if left untreated.
AK is extremely common, especially in adults over 40 with a history of sun exposure, fair skin, or outdoor work or hobbies. Many patients have more than one lesion, since the same sun exposure that caused one AK typically affected a broader area of skin, a concept dermatologists call field cancerization.
How to Detect Actinic Keratosis
AK is often easier to feel than to see. Common signs include:
- A rough, dry, or sandpaper-like patch, usually smaller than a pencil eraser
- A flat to slightly raised patch that can be pink, red, tan, or skin-colored
- Patches that feel more noticeable when you run a finger over them than they look in the mirror
- Most common on chronically sun-exposed areas: the face, ears, scalp (especially if balding), neck, forearms, and backs of the hands
- Sometimes a thickened, wart-like or "horn-like" growth in more advanced lesions
When Should You See a Doctor?
It’s worth getting any rough patch evaluated, but see a dermatologist sooner if:
- A rough patch doesn't go away on its own after a few weeks
- You have multiple rough patches in sun-exposed areas
- An existing patch becomes thicker, tender, or starts to bleed, which can signal progression toward skin cancer
- You have a history of significant sun exposure, sunburns, or outdoor work and haven't had a skin exam recently
- You've had actinic keratosis or skin cancer before, which raises the odds of developing more
What Happens If Actinic Keratosis Is Left Untreated?
A single, untreated AK has roughly a 5 to 10 percent chance of progressing to squamous cell carcinoma over time. That risk rises with the number of lesions: patients with more than 10 actinic keratoses face a meaningfully higher cumulative chance that at least one will progress to SCC.
The tricky part is that there’s no reliable way to tell, just by looking, which AK will progress and which won’t. That uncertainty is exactly why dermatologists recommend treating AKs rather than waiting and watching indefinitely. Leaving lesions untreated also means the underlying sun damage across that area of skin keeps producing new AKs over time, so the problem tends to grow rather than resolve on its own.
The Genesis Dermatology Process
Treatment is matched to how many lesions you have and where they’re located:
- A full skin exam to map out all areas of sun damage, not just the spot that prompted your visit
- Cryotherapy (freezing) for isolated, well-defined lesions, often completed in a single visit
- Topical field-treatment options, like 5-fluorouracil or imiquimod, or photodynamic therapy, for patients with widespread sun damage and multiple AKs
- A biopsy if any lesion looks atypical or thickened enough to raise concern for early squamous cell carcinoma
- A maintenance plan, since new AKs can continue to appear on chronically sun-damaged skin, along with sun protection guidance to reduce future lesions
Ready to Take the Next Step?
Rough, scaly patches are worth a closer look, even if they don’t seem urgent. Schedule a skin exam with the board-certified dermatologists at Genesis Dermatology in Jupiter, FL, and treat sun damage before it becomes something more serious.
Frequently Asked Questions
Is actinic keratosis cancer?
No, AK is precancerous, meaning it’s not cancer but has the potential to become squamous cell carcinoma if left untreated. That’s why dermatologists recommend treating it rather than ignoring it.
Will actinic keratosis go away on its own?
Some individual lesions can regress on their own, but many don’t, and there’s no reliable way to predict which ones will resolve versus progress. Treatment is the more predictable path, especially if you have multiple lesions.
How many treatments will I need?
It depends on the treatment approach. A single lesion treated with cryotherapy may need just one session, while topical field therapy for widespread sun damage typically involves a course of treatment over several weeks.
Is treatment covered by insurance?
Yes, actinic keratosis treatment is generally considered medically necessary and is typically covered by insurance, since it’s aimed at preventing progression to skin cancer.
How can I prevent new actinic keratoses from forming?
Daily broad-spectrum sunscreen, protective clothing, and avoiding peak sun hours all reduce your risk of new lesions. Your dermatologist can also recommend a personalized skin care and monitoring routine based on your history.
Does having actinic keratosis mean I'll definitely get skin cancer?
No. Most actinic keratoses never progress to cancer, especially when treated. Having AK does mean you’re at higher overall risk for skin cancer, which is why ongoing skin checks are part of a good long-term plan.