Actinic keratosis is a precancerous lesion of the skin, which can be cured if it is detected early, diagnosed early and treated early. 1. Solar keratosis is a pre-cancerous skin lesion due to long-term sunlight damage to the skin. The onset of the disease is a long-term process, usually 40~50 years old people most common, ultraviolet radiation, radiant heat, ionizing radiation, and contact with asphalt and kerosene refining products may trigger the onset of the disease, middle-aged men are more common. If you find that the face, neck, arms, arms and other exposed skin erythema, and the color gradually deepen or bleeding symptoms should immediately seek medical attention. 2. Smaller solar keratoses can be treated with freezing or laser, while larger ones can be treated with photodynamic or topical imiquimod cream. If the skin lesions have obvious hyperplasia, or the risk of transformation into squamous cell carcinoma is higher, the means of complete excision can be chosen. With early detection, diagnosis and treatment, solar keratosis can be cured. However, if solar keratosis is not treated in a timely manner, there is a possibility of transformation into squamous cell carcinoma, which may have a poor prognosis. If you are found to have solar keratosis, it is recommended to go to the dermatology department in time and choose the appropriate treatment under the guidance of the physician, do not blindly self-medication, so as not to delay the condition.