Thank you for your question about combining Carboxytherapy with hyaluronic acid (HA) fillers under the eyes. Here is some information that might help you: Carboxytherapy Overview: Carboxytherapy involves the injection of carbon dioxide gas into the skin, which can improve circulation and stimulate collagen production. It's often used to reduce dark circles under the eyes by enhancing blood flow and improving skin texture. Compatibility with HA Fillers: It is generally safe to undergo Carboxytherapy after having HA fillers like Restylane. The treatments target different concerns: fillers add volume and smoothness, while Carboxytherapy addresses pigmentation and circulation. However, it's important to ensure that enough time has passed since your filler treatment to avoid any potential interactions or complications. Consultation with a Professional: Before proceeding with Carboxytherapy, consult with your dermatologist or aesthetic professional. They can assess your specific situation, considering the timing of your previous filler treatment and the condition of your under-eye area, to recommend the best course of action. Addressing Dark Circles: Since your primary concern is persistent dark circles, your specialist might suggest combining Carboxytherapy with other treatments or skincare products that target pigmentation for optimal results. I hope this information is helpful. Please consult with a qualified specialist to ensure that the treatments are suitable for your needs. Best regards,