How to Treat Actinic Keratosis: Creams, Procedures, and What Actually Works

The good news is that there are several effective treatments available. The most appropriate option depends on factors such as the number of lesions, their location, the extent of sun damage, and individual patient circumstances.

A clear understanding of how each treatment works can support more informed discussions about care.

Choosing the right treatment for actinic keratosis

There is no single treatment for actinic keratosis that is best for every patient. Some treatments are designed to remove individual lesions, while others treat larger areas of sun-damaged skin where multiple actinic keratoses may be present.

Dermatologists generally divide treatment into two approaches:

Lesion-directed treatment, which targets individual actinic keratoses. It is often used when only a small number of lesions are present.

Field-directed treatment, which treats both visible lesions and surrounding sun-damaged skin where abnormal cells may already be developing. It is particularly useful for more widespread areas of sun damage.

The choice depends on the number of lesions, their thickness, previous treatments, and the overall condition of the skin. In some cases, actinic keratoses can also sit within a broader context of significant sun damage where early skin cancer may already be present or developing.

When this happens, management needs to shift from treating precancerous change alone to carefully assessing and addressing any confirmed malignancy. An appropriate skin cancer treatment plan will then depend on the specific type of cancer and how far it has progressed.

Creams used to treat actinic keratosis

Prescription creams are commonly used when multiple actinic keratoses affect the same area of skin. These treatments work by targeting abnormal cells across a wider field of sun-damaged skin rather than treating individual lesions one by one.

• 5-fluorouracil (5-FU) – A topical chemotherapy cream that destroys abnormal skin cells. It commonly causes redness, inflammation, crusting, and soreness during treatment. These skin reactions are usually expected and indicate that the medication is affecting the abnormal cells, although their severity varies between individuals.
• Imiquimod – Works by stimulating the immune system to recognise and clear abnormal cells. It often leads to a local skin reaction, including redness, inflammation, and irritation.
• Diclofenac gel – A milder anti-inflammatory treatment applied over several weeks. It is generally better tolerated but may produce a more gradual response.
• Tirbanibulin – A newer topical treatment used over a short course. It targets abnormal cell growth and is associated with a shorter treatment duration than some other topical therapies.

Procedures that remove actinic keratosis

Not every actinic keratosis requires a prescription cream. Individual lesions are often treated using straightforward procedures performed in clinics.

Cryotherapy is one of the most common treatments. Liquid nitrogen is applied to freeze the abnormal tissue, which then gradually heals over the following days or weeks.

Photodynamic therapy (PDT) combines a light-sensitive cream with a special light source to destroy abnormal cells. It can be particularly useful when there are multiple lesions across a larger area of sun-damaged skin.

Some thicker or more persistent lesions may be treated with curettage, where the abnormal tissue is gently scraped away, sometimes followed by cautery to reduce the risk of recurrence.

If a lesion appears unusually thick, ulcerated, rapidly growing, or there is uncertainty about the diagnosis, a biopsy may be recommended before treatment to exclude invasive squamous cell carcinoma.

The most appropriate procedure depends on the number, size, location, and appearance of the lesions, as well as the patient's overall health and treatment goals.

Which treatment is most effective?

Patients often want to know which treatment is 'the best', but there is rarely a single answer.

For isolated lesions, cryotherapy is often an effective treatment. For larger areas of sun-damaged skin with multiple actinic keratoses, field-directed treatments such as 5-fluorouracil or imiquimod may provide greater benefit because they treat both visible and microscopic abnormal cells.

Photodynamic therapy may also be considered for selected patients, particularly where cosmetic outcomes are important or when multiple lesions are present.

Rather than asking which treatment works best overall, it is often more helpful to ask which treatment is most appropriate for the individual patient, taking into account the number of lesions, their location, and the extent of sun damage.

What to expect during treatment

Many treatments for actinic keratosis cause temporary skin reactions.

Depending on the treatment used, patients may experience redness, soreness, crusting, peeling, blistering, temporary discomfort or tenderness. These changes are often expected and usually improve as the skin heals.

The duration of recovery varies. Cryotherapy may heal within a few weeks, while topical treatments often produce a more prolonged reaction before healthy skin gradually replaces the damaged tissue.

Following treatment instructions carefully and attending any recommended follow-up appointments can help ensure the skin heals as expected. It is also important to protect the treated area from further sun exposure by wearing protective clothing and using a broad-spectrum sunscreen, as ultraviolet radiation can slow healing and contribute to additional skin damage.

The intensity of the skin reaction can vary from person to person, even when the same treatment is used. If you notice signs of infection, severe pain, or symptoms that seem unusual, you should contact your doctor, dermatologist, or clinical team for advice.

Can actinic keratosis come back?

Yes. Even after successful treatment, new actinic keratoses can develop because the surrounding skin has often experienced years of cumulative sun damage.

This does not necessarily mean the previous treatment has failed. Instead, it reflects the ongoing effects of ultraviolet exposure on the skin.

For this reason, many patients benefit from regular skin examinations, continued sun protection, and prompt assessment of any new or changing lesions. These steps form an important part of long-term skin cancer prevention and help support the early detection of suspicious changes.

When should you seek a second opinion?

Most cases of actinic keratosis are straightforward to diagnose and manage. However, a second opinion may be helpful if a lesion is not responding to treatment, the diagnosis is uncertain, or there are concerns that invasive skin cancer may be present.

In some cases, actinic keratosis can form part of a broader picture of sun damage where skin cancer has already developed or is suspected. When this happens, it becomes especially important to have expert input to ensure the most appropriate investigations and treatment plan are in place.

Seeking a second opinion can provide reassurance and specialist guidance, particularly when skin cancer is being considered or when more complex cancer treatment decisions are needed.

About Dr James Wilson

Actinic keratosis is usually managed within dermatology, but it can raise important questions about skin cancer risk and when further specialist assessment may be appropriate.

Dr James Wilson is a consultant clinical oncologist in private practice in London, specialising in the treatment of melanoma and skin cancer. His work includes advanced radiotherapy, immunotherapy, targeted therapies, and systemic cancer care. He helps patients understand complex treatment decisions and provides clear, personalised guidance when skin cancer has been diagnosed or when a second opinion is needed.