Hello, Thank you for reaching out with your concern about the stretch mark under your chin following filler treatment. Here are some insights into what might be causing this and potential ways to address it: Possible Causes: Skin Stretching: The introduction of filler can sometimes stretch the skin, especially if a significant amount is used or if the skin is naturally thin or less elastic. This stretching might contribute to the appearance of stretch marks. Filler Displacement: Although less common, if the filler has shifted or is uneven, it might create an appearance similar to that of a stretch mark. Dissolving Fillers: If the filler is hyaluronic acid-based, it can be dissolved using an enzyme called hyaluronidase. However, dissolving the filler may not necessarily eliminate the stretch mark if it has already formed due to skin stretching. Treatment Options for Stretch Marks: Topical Treatments: Creams containing retinoids or hyaluronic acid may help improve the appearance of stretch marks over time. Laser Therapy: Fractional lasers or pulsed dye lasers can stimulate collagen production and improve skin texture, potentially reducing the appearance of stretch marks. Microneedling: This treatment can also promote collagen production and improve skin texture, making stretch marks less noticeable. Consultation: It is advisable to consult with a dermatologist or aesthetic specialist to evaluate the mark and determine the best course of action. They can provide a tailored treatment plan and discuss whether dissolving the filler might be beneficial in your case.