Picture of Actinic Cheilitis
Actinic cheilitis is a precancerous condition that usually appears on the lower lips. Scaly patches or persistent dryness and cracking of the lips may be present. Actinic cheilitis may evolve into invasive squamous cell carcinoma if not treated.
Image Source: Interactive Medical Media LLC
Text: "Precancerous Skin Lesions and Skin Cancer", WebMD Slideshow