What can I do about my premature jowls and double chin? (photos)

Thank you for sharing your question and posting your photos. You can have threads pull back the jowls and place fillers into the marionette lines and chin to improve the areas of your concerns. See an oculofacial surgeon for comprehensive evaluation and treatment. Good luck!

Based on these photos, it appears that you are candidate for selective liposuction of neck, jowls and jawline. In person consultation with a board certified plastic surgeon is recommended. Good luck.