Thank you for sharing your question. Unfortunately garments used externally on the skin can not make any material changes to the quality of your skin to limit skin laxity. If you are referring to wearing one after Kybella, it is not necessary. Hope this helps.
Thank you for your question! Wearing a chin strap will not make your skin tighter neither Kybella will. Kybella is used to remove fat from the chin and neck area, and it does not help with ski laxity. You may feel wear a chin strap if you want to, but it will not alter Kybella results in positive or negative way. Best of luck!