Even though actinic keratoses may initially appear inconspicuous, they should be taken seriously. Dermatologists consider them a possible early form of squamous cell carcinoma, a common type of non-melanoma skin cancer. Regular skin examinations by a dermatologist are therefore especially important.
Actinic keratoses are cellular changes in the outermost layers of the skin caused by chronic UV radiation. They primarily develop in areas of skin that have been regularly exposed to the sun over many years.
Typical locations include:
- Forehead
- Nose
- Cheeks
- Ears
- Bald scalp
- Backs of the hands
- Forearms
The skin changes often appear as small reddish, skin-colored, or brownish areas with a rough surface. Many patients describe the sensation as if the skin feels like fine sandpaper.
Some areas are barely visible at first and can only be felt by touch. Others appear clearly thickened or more heavily keratinized.
The most important cause is long-term exposure of the skin to UV radiation. UV rays damage the genetic material of skin cells. Over many years, this damage accumulates and can lead to abnormal cellular changes.
Fair skin types
People with fair skin, light-colored eyes, and blonde or red hair have less natural UV protection and therefore a significantly increased risk.
Spending a lot of time outdoors
Individuals who spend a lot of time outdoors for work or leisure are more affected. This includes, for example, construction workers, landscaping professionals, or physically active people with high sun exposure.
Age and immune system
Actinic keratoses usually occur from middle age onward because UV damage accumulates over decades. A weakened immune system can also promote their development.
Actinic keratoses usually develop slowly. Typical characteristics include:
- Rough, dry, or scaly patches of skin
- Mild redness
- Thickened or crusted areas
- Occasional itching or burning
Many affected individuals first notice the rough texture of the skin before a visible change appears.
If an area grows noticeably, bleeds, becomes painful, or becomes more hardened, it should be examined by a dermatologist promptly, as this may indicate progression.
Actinic keratoses are not just a cosmetic issue. They represent a medically significant precancerous stage of skin cancer.
Some of these lesions can develop into squamous cell carcinoma over time. This belongs to the group of non-melanoma skin cancers.
For this reason, dermatologists usually recommend early and consistent treatment.
Key goals of treatment include:
- Removal of the altered skin cells
- Prevention of cancer development
- Treatment of additional invisible UV damage in the surrounding skin
In addition, regular dermatologic checkups are important to detect new changes at an early stage.
Which therapy is most suitable depends on several factors:
- Number of lesions
- Size of the affected areas
- Location
- Patient’s skin type
Several treatment methods are often combined.
Cryotherapy
During freezing with liquid nitrogen, altered skin cells are specifically destroyed. This method is particularly suitable for single, well-defined lesions.
Medical creams
Certain active ingredients can be applied directly to the skin. They destroy abnormal cells or activate the body’s immune system to target these cells.
Photodynamic therapy
In this method, a light-sensitive substance is first applied to the skin. The area is then treated with a special light source, which selectively destroys the damaged cells.
This therapy is particularly suitable for larger or multiple actinic keratoses.
Laser therapy
Lasers can precisely remove superficial layers of skin and are mainly used for certain widespread lesions.
The most important protection against actinic keratoses is consistent management of UV exposure.
This includes:
- Sunscreen with a high SPF
- Protective clothing and hats
- Avoiding intense midday sun
- Avoiding tanning beds
People who already have significant sun-damaged skin should also undergo regular skin examinations by a dermatologist.
What is an actinic keratosis?
An actinic keratosis is a skin change caused by UV radiation with a rough, scaly surface. It is considered a possible precursor to non-melanoma skin cancer.
How can you recognize an actinic keratosis?
Typical signs include small rough or scaly patches that often feel like sandpaper. They frequently appear on the face, scalp, or backs of the hands.
Are actinic keratoses dangerous?
They are usually treatable at an early stage but should still be taken seriously. Some lesions may develop into skin cancer.
Can actinic keratoses disappear on their own?
Some lesions may temporarily appear less noticeable. However, they often persist or recur. Dermatologic evaluation is therefore important.
How are actinic keratoses treated?
Depending on the findings, treatment options include cryotherapy, prescription creams, photodynamic therapy, or laser treatments. The dermatologist determines the most appropriate option individually.
How can actinic keratoses be prevented?
Key measures include daily sun protection, UV-avoidant behavior, and regular skin cancer screening.
Actinic keratoses are common skin changes caused by long-term UV exposure. They should not be underestimated, as they are considered precursors to non-melanoma skin cancer.
Early diagnosis and consistent dermatologic treatment can prevent these lesions from developing into skin cancer.
People who have their skin examined regularly and consistently practice sun protection can significantly reduce their personal risk.
