Conventional Photodynamic Therapy vs. Painless Photodynamic Therapy for Actinic Keratosis

Exclusion Criteria

• •1. Those who had ALA-PDT and any other studies that affect this study within 12 weeks ;
• •2. There are other facial diseases that may affect the efficacy evaluation, such as other photodermatosis;
• •3. Take phototoxic or photosensitizer within 8 weeks;
• •4. Clinical and / or pathological prove that the tumor has invaded other organs or tissues;
• •5. Serious immunocompromised persons;
• •6. scar constitution;
• •7. Patients are known to have skin photosensitivity, porphyria, or allergies to ALA, light or lidocaine;
• •8. Persons are suffering from severe internal diseases, mental and mental illness, infectious diseases or pregnant or lactating women.