Inclusion criteria 1. Meet the diagnostic criteria of chronic inflammatory skin disease, with limited lesions, mainly including pathological scars, isolated lesions of sarcoidosis and local hypertrophic lesions of chronic eczema; 2. Good compliance, agree not to accept the test during the test period Any local injection treatment other than treatment; 3. Voluntarily sign an informed consent form and agree to participate in all visits, inspections and treatments in accordance with the requirements of the trial protocol.  Exclusion criteria  1. Those who have received triamcinolone acetonide injection treatment in the lesion area within the past year; 2. Those who have precancerous skin lesions or have a tendency to become cancerous, or those who have received local radiation therapy on their skin; 3. There are skin infections, inflammations, herpes, and silver Those with active skin diseases such as scaly; 4. Those who have autoimmune diseases or are receiving immunotherapy; 5. Those who have coagulation dysfunction or are using anticoagulant/antiplatelet drugs; 6. Those who have other serious diseases, such as liver and kidney Insufficiency, diabetes, high blood pressure, etc.; 7. Women who are planning to become pregnant, pregnant or breastfeeding; 8. People who suffer from mental illness, or are currently taking antipsychotic drugs; 9. Other conditions that the investigator considers inappropriate to participate in this trial , Such as high expectations, poor compliance.