What Is Actinic Keratosis?

Actinic keratosis (AK), also called solar keratosis, is a rough or scaly area of skin caused by accumulated exposure to ultraviolet (UV) radiation. It commonly develops on sun-exposed skin, particularly in adults with a long history of outdoor sun exposure.

AK is considered a precancerous skin growth. Although most individual AKs do not become cancerous, some can progress to squamous cell carcinoma (SCC). Because it is not possible to determine by appearance alone which spots may progress, professional evaluation is important and treatment is commonly recommended for confirmed AKs.

What Causes Actinic Keratosis?

Actinic keratosis develops as UV exposure damages skin cells over time. Repeated exposure to sunlight — including routine exposure that does not cause sunburn — contributes to the cumulative UV burden on the skin.

Reducing future UV exposure cannot erase damage that has already occurred, but consistent sun protection can help limit additional damage. People who have developed one AK may develop others because surrounding sun-exposed skin has often experienced similar cumulative exposure.

Who Gets Actinic Keratosis?

Anyone can develop actinic keratosis, but it is more common among people with certain characteristics or histories, including:

• Years of frequent outdoor sun exposure
• A history of sunburns
• Living or spending substantial time in sunny climates
• Outdoor occupations or recreational activities
• Fair skin, light-colored eyes, or blonde or red hair
• Thinning hair or baldness that leaves the scalp exposed
• A weakened immune system
• A previous history of actinic keratosis or skin cancer

People who have already had one or more AKs treated may be more likely to develop additional spots. Ongoing skin examinations and sun protection are therefore important.

What Does Actinic Keratosis Look and Feel Like?

Actinic keratosis most commonly develops on areas that receive substantial lifetime sun exposure, including:

• Face — particularly the nose, cheeks, forehead, and temples
• Scalp — especially where hair is thinning or absent
• Ears and neck
• Backs of the hands and forearms
• Shoulders and upper chest
• Lower legs

AKs can vary considerably in appearance. They may look rough, dry, scaly, crusted, flat, or slightly raised, and their color can range from skin-toned to pink, red, or brown. Some feel like sandpaper and may be easier to notice by touch than by sight. They may itch, sting, feel tender, or cause no discomfort.

Appearance alone cannot confirm that a spot is actinic keratosis. Other skin conditions — including some skin cancers — can look or feel similar.

Is Actinic Keratosis Dangerous?

Actinic keratosis is not itself invasive skin cancer, but it is considered precancerous because some AKs can progress to squamous cell carcinoma. The likelihood of progression for any individual spot is difficult to predict, and estimates vary among studies.

The presence of AK can also indicate substantial cumulative UV damage and an increased risk of developing additional AKs or skin cancer. This is why dermatologists commonly recommend evaluating and treating confirmed AKs rather than relying on appearance or waiting for a spot to change.

How Is Actinic Keratosis Diagnosed?

A dermatologist can often identify actinic keratosis by carefully examining and feeling the skin. The clinician may also consider the spot’s history, symptoms, location, and the patient’s individual risk factors.

If the diagnosis is uncertain or the spot has features that could indicate skin cancer, a dermatologist may perform a biopsy so the tissue can be examined under a microscope.

It is important not to diagnose a rough or changing spot at home. Eczema, psoriasis, seborrheic keratosis, and skin cancers can sometimes resemble AK. A qualified healthcare professional can determine whether evaluation, monitoring, biopsy, or treatment is appropriate.

Understanding Your Actinic Keratosis Options

There is no single approach that is right for every person or every AK. The appropriate choice depends on factors such as the number of spots, their location and appearance, the extent of surrounding sun damage, other medical considerations, and personal preferences. A dermatologist can explain which medical options may be appropriate for you.

Cryotherapy

Cryotherapy, also called cryosurgery, uses liquid nitrogen to freeze an individual AK. The treated area may blister, crust, swell, or feel sore as it heals. Temporary or lasting changes in skin color can occur, and some spots may require more than one treatment.

Prescription Topical Medications

When multiple AKs or a broader area of sun-damaged skin needs treatment, a dermatologist may prescribe medication for use at home. Options can include 5-fluorouracil (5-FU), imiquimod, diclofenac sodium gel, or tirbanibulin. Treatment schedules, reactions, precautions, and expected recovery differ by medication.

These are medical treatments and should be used according to the directions provided by the prescribing healthcare professional.

Photodynamic Therapy

Photodynamic therapy (PDT) involves applying a light-sensitizing medication and then exposing the treated area to a controlled light source. It may be used when multiple AKs or a larger area of sun-damaged skin requires treatment. Redness, crusting, discomfort, and temporary sensitivity to light can occur during recovery.

Other In-Office Procedures

Depending on the characteristics of the AKs, a dermatologist may recommend curettage, a medical-grade chemical peel, laser resurfacing, or another professionally administered procedure. Each option has different benefits, limitations, and recovery considerations.

Choosing At-Home Skincare for Rough, Sun-Exposed Skin

People researching actinic keratosis are often dealing with a broader, familiar concern: skin that has become rough, flaky, or visibly changed after years in the sun. Alongside learning about medical care, many also explore focused skincare for the individual areas they can see and feel.

That is where AKti-Clear fits. It was created for people who have one particular rough, sun-exposed spot in mind and want a precise, structured way to care for it at home.

AKti-Clear is a cosmetic skincare product, not a drug, and is not intended to diagnose, treat, cure, or prevent actinic keratosis, skin cancer, or any disease. It does not replace professional diagnosis or medical treatment. Have a new, changing, bleeding, painful, or persistent spot evaluated by a qualified healthcare professional, and do not discontinue prescribed care based on information presented here.

Reducing the Risk of Additional Sun Damage

Consistent sun protection can help reduce further UV damage and may lower the risk of developing additional actinic keratoses and skin cancers. Common protective measures include:

• Use a broad-spectrum, water-resistant sunscreen with SPF 30 or higher
• Reapply sunscreen as directed, especially after swimming or sweating
• Wear sun-protective clothing, a wide-brimmed hat, and sunglasses
• Seek shade, particularly when the sun is strongest
• Avoid tanning beds and other sources of artificial UV radiation
• Check your skin regularly for new or changing spots
• Ask a dermatologist how often you should receive a professional skin examination

People with a history of AK or skin cancer should follow the examination and sun-protection recommendations provided by their healthcare professional.

When to See a Dermatologist

Arrange a professional skin evaluation if you notice:

• A new or persistent rough or scaly spot
• A sore that does not heal or repeatedly returns
• A spot that bleeds, crusts, grows, or changes
• A growth that becomes painful, tender, or persistently itchy
• Any spot that concerns you or looks different from the others

Seek prompt professional attention for a rapidly changing, growing, bleeding, painful, or non-healing spot. A dermatologist can determine whether the area is actinic keratosis, another skin condition, or something requiring biopsy or medical treatment.

Sources and Further Reading

• American Academy of Dermatology: Actinic Keratosis Diagnosis and Treatment
• American Academy of Dermatology: Skin Cancer Symptoms and Diagnosis
• American Cancer Society: Treating Actinic Keratosis and Squamous Cell Skin Cancer

Important: This page provides general educational information and is not medical advice. It cannot diagnose a skin condition or determine whether a particular spot is appropriate for skincare. Consult a qualified healthcare professional regarding diagnosis, treatment, or changes to your medical care.