Actinic cheilitis: why sun-damaged lips need attention
Lips burn too, and they have less natural protection than the rest of your face. Years of sun on the lower lip can cause actinic cheilitis, a dry, scaly change that dermatologists treat as precancerous.
- Actinic cheilitis is the lip form of actinic keratosis, from chronic UV exposure; about 90% of cases affect the lower lip.
- It's precancerous: it can lead to squamous cell carcinoma, and smoking raises lip cancer risk.
- Protection is a sunscreen lip balm, a wide-brim hat and limiting sun; see a doctor for a sore that won't heal.
What it is
According to DermNet: Actinic cheilitis, actinic cheilitis "is the lip form of actinic keratosis due to chronic sun exposure" (see actinic keratosis). The lower lip is more vulnerable than surrounding skin because its surface layer is thinner and less pigmented.
Who gets it
It mainly affects fair-skinned adults in sunny climates, especially outdoor workers, who often remember sunburned lips when they were younger. DermNet says it's three times more common in men than women. People with it often have actinic keratoses or sun spots elsewhere on the scalp, ears, face and hands.
Signs to look for
- Dryness and thin, fragile skin, most often on the lower lip.
- Thick, scaly patches; swelling, redness or soreness.
- Cracks, crusting or small sores.
- A blurred edge between the red part of the lip and the skin around it.
- White thickened patches or pale or yellow areas.
- Lipstick that "bleeds" into the lines around the lips.
Why it matters
DermNet calls actinic cheilitis "a pre-malignant condition" that predisposes to squamous cell carcinoma in situ and invasive squamous cell carcinoma. Lip cancer is more common in smokers; other risk factors include HPV, heavy alcohol use and a weakened immune system. Cancer should be suspected if the lip becomes tender in one spot or develops a persistent sore or growing lump. See a doctor promptly for any of these.
Treatment and prevention
Diagnosis is usually by examination, with a biopsy if cancer is suspected. A dermatologist may use creams, photodynamic therapy, cryotherapy, laser or surgery depending on severity. Everyone with it is advised to stop smoking and use lifelong, year-round sun protection:
- Apply a lip balm with sunscreen often, and reapply after eating or drinking.
- Wear a wide-brim hat (see sun-protective clothing).
- Limit midday sun, and check the UV index.
DermNet says actinic cheilitis can improve with effective sun protection and treatment, while continued exposure without treatment raises the risk of cancer.
Educational information only, not medical advice. See a board-certified dermatologist for diagnosis and treatment. See our medical disclaimer.
Published October 29, 2026. Sources are linked in the text. See our Medical Disclaimer.