Actinic Keratosis (AK)

Medically reviewed by John Sammis, D.O. on October 25, 2023
12 min read

Actinic keratosis (AK) is a skin condition caused by sun exposure. It is characterized by scaly, rough patches on the skin that can range in color from pink to red to brown. AK is a precancerous condition, meaning that it can develop into a form of skin cancer if left untreated. It is most commonly found on areas of the skin that are exposed to the sun, such as the face, ears, neck, scalp, and hands.

Causes of Actinic Keratosis

AK is caused by long-term exposure to ultraviolet (UV) radiation from the sun. People who spend a lot of time outdoors, such as farmers, construction workers, and outdoor enthusiasts, are at an increased risk of developing AK. People with fair skin, light-colored eyes, and red or blond hair are also more likely to develop AK.

Diagnosis of Actinic Keratosis

AK is usually diagnosed by a physical examination of the skin. A doctor may use a magnifying glass to examine the skin and look for any suspicious lesions. In some cases, a biopsy may be necessary to confirm the diagnosis. During a biopsy, a small sample of skin is taken and examined under a microscope.

Prevention of Actinic Keratosis

The best way to prevent AK is to limit exposure to UV radiation. This can be done by wearing protective clothing, such as long-sleeved shirts and wide-brimmed hats, when outdoors. Sunscreen should also be applied to exposed areas of the skin, and sunglasses should be worn to protect the eyes. Avoiding tanning beds is also recommended.

Take the Actinic Keratosis (AK) Assessment

Symptoms

Common Symptoms of Actinic Keratosis

  • Rough, scaly patches on the skin
  • Patches that range in color from light pink to dark brown
  • Patches that may be itchy or tender
  • Patches that may bleed or crust over
  • Patches that may become thicker or raised

If you notice any of these symptoms on your skin, it is important to see a doctor as soon as possible. Your doctor can diagnose AK and recommend treatment options.

Treatment for Actinic Keratosis

Treatment for AK depends on the size and severity of the patches. Common treatments include:

  • Cryotherapy: freezing the patches with liquid nitrogen
  • Topical creams: applying a cream to the patches
  • Laser therapy: using a laser to remove the patches
  • Surgery: removing the patches with a scalpel

It is important to seek treatment for AK as soon as possible to reduce the risk of it developing into skin cancer. Your doctor can help you decide which treatment option is best for you.

Causes

Sun Exposure

The most common cause of actinic keratosis is too much exposure to UV radiation from the sun. This is especially true for people who spend a lot of time outdoors, such as farmers, construction workers, and outdoor enthusiasts. People with fair skin, light eyes, and red or blond hair are also more likely to develop AK due to their increased sensitivity to UV radiation.

Age

Age is another factor that can increase the risk of developing actinic keratosis. As people age, their skin becomes thinner and less able to protect itself from UV radiation. This makes older people more susceptible to AK.

Immune System

People with weakened immune systems, such as those with HIV/AIDS or those undergoing chemotherapy, are more likely to develop actinic keratosis. This is because their bodies are less able to fight off the UV radiation that causes AK.

Medications

Certain medications, such as those used to treat psoriasis, can increase the risk of developing actinic keratosis. This is because these medications can make the skin more sensitive to UV radiation.

Genetics

Genetics can also play a role in the development of actinic keratosis. People with a family history of AK are more likely to develop the condition.

Conclusion

Actinic keratosis is a skin condition caused by too much exposure to UV radiation from the sun or tanning beds. The most common causes of AK are sun exposure, age, weakened immune system, certain medications, and genetics. If you think you may be at risk for AK, it is important to speak to your doctor about ways to reduce your risk.

Getting a Diagnosis

Diagnosing Actinic Keratosis

The diagnosis of AK is usually made by a physical examination of the skin. Your doctor may use a magnifying glass to look closely at the affected area. They may also take a biopsy of the skin to confirm the diagnosis. During a biopsy, a small sample of the skin is taken and examined under a microscope.

Your doctor may also use a special light called a Wood’s lamp to help diagnose AK. This light can help to identify areas of the skin that are affected by AK. The affected areas will appear to be a different color than the surrounding skin.

Treating Actinic Keratosis

Once AK has been diagnosed, it is important to begin treatment as soon as possible. Treatment options for AK include topical creams, cryotherapy, laser therapy, and surgery. Your doctor will discuss the best treatment option for you based on the severity of your condition.

It is important to remember that AK can develop into a form of skin cancer if left untreated. Therefore, it is important to follow your doctor’s instructions and to have regular check-ups to monitor the condition.

Questions for Your Doctor

Treatment Options

Your doctor will discuss the different treatment options available for AK. These may include topical creams, cryotherapy, laser therapy, or surgery. Your doctor will help you decide which option is best for you based on the size and location of the AK lesions.

Side Effects

It is important to discuss any potential side effects of the treatment with your doctor. Depending on the treatment option, side effects may include redness, swelling, itching, or burning. Your doctor will be able to provide more information about the potential side effects of the treatment.

Follow-up Care

Your doctor will likely recommend follow-up care after treatment. This may include regular skin exams to check for any new AK lesions or changes in existing lesions. Your doctor may also recommend lifestyle changes to reduce your risk of developing new AK lesions.

Questions

Be sure to ask your doctor any questions you may have about AK and its treatment. Your doctor can provide more information about the condition and the best treatment options for you.

Treatment

Cryosurgery

Cryosurgery is a common treatment for AK. During this procedure, liquid nitrogen is applied to the affected area to freeze and destroy the abnormal cells. This treatment is usually done in a doctor’s office and can be repeated if necessary. Side effects may include redness, swelling, and blistering.

Topical Treatments

Topical treatments are creams, gels, and lotions that are applied directly to the skin. These treatments contain chemicals that help to reduce the appearance of AK. Common topical treatments include 5-fluorouracil (5-FU), imiquimod, and diclofenac. Side effects may include redness, itching, and burning.

Photodynamic Therapy

Photodynamic therapy (PDT) is a newer treatment for AK. During this procedure, a light-sensitive drug is applied to the affected area and then exposed to a special light. This light activates the drug, which destroys the abnormal cells. PDT is usually done in a doctor’s office and can be repeated if necessary. Side effects may include redness, swelling, and blistering.

Laser Therapy

Laser therapy is another treatment option for AK. During this procedure, a laser is used to destroy the abnormal cells. This treatment is usually done in a doctor’s office and can be repeated if necessary. Side effects may include redness, swelling, and blistering.

Surgery

In some cases, surgery may be necessary to remove AK. During this procedure, the affected area is cut away and the abnormal cells are removed. This treatment is usually done in a doctor’s office and can be repeated if necessary. Side effects may include redness, swelling, and scarring.

Conclusion

Actinic keratosis (AK) is a common skin condition caused by too much sun exposure. While it is not cancerous, it can develop into skin cancer if left untreated. Fortunately, there are several treatments available to help reduce the appearance of AK and prevent it from becoming cancerous. These treatments include cryosurgery, topical treatments, photodynamic therapy, laser therapy, and surgery. Talk to your doctor to determine which treatment is right for you.

Drugs & Medications

Treatment Options for Actinic Keratosis (AK)

Treatment for AK depends on the size, location, and number of lesions. Common treatments include:

  • Cryotherapy: This involves freezing the lesions with liquid nitrogen.
  • Topical creams: These creams contain medications that can help reduce the lesions.
  • Photodynamic therapy: This involves using a light-activated drug to destroy the lesions.
  • Surgery: This involves removing the lesions with a scalpel or laser.

It is important to talk to your doctor about the best treatment option for you. Some treatments may not be suitable for everyone, so it is important to discuss your options with your doctor.

Preventing Actinic Keratosis (AK)

The best way to prevent AK is to limit your exposure to UV radiation. This includes avoiding tanning beds and wearing sunscreen with an SPF of 30 or higher when outdoors. Wearing protective clothing, such as a wide-brimmed hat and sunglasses, can also help protect your skin from the sun’s harmful rays.

It is also important to have regular skin checks with your doctor. This can help detect any changes in your skin early, which can help prevent the development of skin cancer.

Diet

Eat a Healthy Diet

Eating a healthy diet is important for overall health and may help reduce the risk of AK. Eating a diet rich in fruits, vegetables, whole grains, and lean proteins can help provide the body with essential nutrients and antioxidants. Additionally, limiting processed foods, sugar, and saturated fats can help reduce inflammation and improve overall health.

Increase Vitamin D Intake

Vitamin D is important for healthy skin and may help reduce the risk of AK. Foods that are high in vitamin D include fatty fish, such as salmon, tuna, and mackerel, as well as fortified dairy products, such as milk and yogurt. Additionally, spending time in the sun can help the body produce vitamin D.

Consume Antioxidants

Antioxidants are compounds that can help protect the body from damage caused by free radicals. Foods that are high in antioxidants include fruits, such as blueberries, strawberries, and raspberries, as well as vegetables, such as spinach, kale, and broccoli. Additionally, nuts, seeds, and legumes are also good sources of antioxidants.

Limit Alcohol Intake

Alcohol can increase inflammation and damage the skin, which may increase the risk of AK. Limiting alcohol intake can help reduce the risk of developing the condition. Additionally, drinking plenty of water can help keep the skin hydrated and reduce the risk of AK.

Conclusion

Making dietary changes can help reduce the risk of developing actinic keratosis (AK). Eating a healthy diet, increasing vitamin D intake, consuming antioxidants, and limiting alcohol intake can all help reduce the risk of AK. Additionally, wearing sunscreen and avoiding too much sun exposure can also help reduce the risk of developing the condition.

Lifestyle

Wear Sunscreen

One of the best ways to protect your skin from AK is to wear sunscreen every day. Look for a sunscreen with an SPF of 30 or higher and make sure it is broad-spectrum, meaning it protects against both UVA and UVB rays. Reapply sunscreen every two hours, or more often if you are swimming or sweating.

Limit Sun Exposure

In addition to wearing sunscreen, it is important to limit your sun exposure. Try to stay out of the sun during peak hours, which are usually between 10am and 4pm. If you must be outside during these hours, wear protective clothing such as a wide-brimmed hat and long-sleeved shirt. Also, avoid tanning beds, which can increase your risk of AK.

Check Your Skin Regularly

It is important to check your skin regularly for any changes. Look for any new or changing moles, spots, or patches on your skin. If you notice anything unusual, make an appointment with your doctor right away.

See Your Doctor Regularly

In addition to checking your skin regularly, it is important to see your doctor for regular skin exams. Your doctor can check for any signs of AK or other skin cancers. They can also provide advice on how to reduce your risk of developing AK.

Eat a Healthy Diet

Eating a healthy diet can help reduce your risk of developing AK. Aim to eat plenty of fruits and vegetables, whole grains, and lean proteins. Avoid processed and sugary foods, which can increase inflammation in the body. Eating a healthy diet can also help keep your skin looking healthy and youthful.

Quit Smoking

Smoking can increase your risk of developing AK and other skin cancers. If you smoke, quitting is one of the best things you can do for your skin. Talk to your doctor about ways to quit smoking and get the support you need to quit for good.

Conclusion

Actinic keratosis (AK) is a common skin condition caused by too much sun exposure. Fortunately, there are lifestyle changes you can make to reduce your risk of developing AK and other skin cancers. Wear sunscreen every day, limit your sun exposure, check your skin regularly, see your doctor for regular skin exams, eat a healthy diet, and quit smoking if you smoke. By following these tips, you can help keep your skin healthy and reduce your risk of developing AK.