Efficacy and Safety of STBF Photodynamic Therapy for Moderate and Severe Acne Vulgaris

Inclusion Criteria: 1. Clinical diagnosed with moderate to severe acne; 2. Male and female patients of age between 18-30 years old ; 3. All patients read the instructions of the subject, willing to follow the program requirements; 4. No other topical treatment received within 2 weeks prior to enrollment; 5. No systemic treatment was given within 4 weeks prior to enrollment; 6. Patients were unsuitable for surgery for various reasons,unwilling to undergo surgery, and signed informed consent when they had informed other alternatives and agreed to take pictures of the lesion. Exclusion Criteria: 1. Those who did not complete the informed consent; 2. The lesions belongs to any of the following conditions: There is damage and inflammation, which may lead to the drug entering the open wound; 3. Patients with skin photoallergic diseases, porphyria; 4. Known to have a history of allergies to test drugs (porphyrins) and their chemically similar drugs; 5. Patients with other obvious diseases that may affect the evaluation of efficacy; 6. Scars or patients with a tendency to form scars; 7. Known to have severe immune dysfunction, or long-term use of glucocorticoids and immunosuppressants; 8. Severe heart, liver, kidney disease; with hereditary or acquired People with sexual coagulopathy 9. Those with severe neurological, psychiatric or endocrine diseases; (10)Women who are pregnant, breast-feeding or using inappropriate contraceptives; those with a history of drug abuse; those who have participated in other drug clinical trials within 4 weeks before treatment.