Observation of the Comfort and Efficacy of CO2 Laser Combined With Cryo 6 for Burn or Linear Scars.

Exclusion Criteria

• •1. Patients with an active or established sun tan;
• •2. Patients with history of allergic reaction to to topical anesthesia;
• •3. Patients with history of keloid scarring, abnormal wound healing and/or prone to bruising;
• •4. Skin malignant tumors or precancerous lesions;
• •5. Patients with diabetes, heart disease, epilepsy, connective tissue disease, etc.;
• •6. Pregnant or breastfeeding patients;
• •7. Patients with recent skin infections (such as viral and bacterial infections);
• •8. Patients who are using other methods to treat similar diseases;
• •9. Patients who had taken isotretinoin within the past year;
• •10. History of cryoglobulinaemia;
• •11. History of cold agglutinin disease and cold haemolysis;
• •12. History of cold urticaria;
• •13. Parts of the body with impaired circulation;
• •14. Raynaud's disease;
• •15. Parts of the body with impaired sensitivity;
• •16. Trophic disorders;
• •17. Hypersensitivity to cold;
• •18. Patients with mental illness;
• •19. Other ineligible patients.