Double chin is an extremely common problem. It can occur due to excess fat in overweight people or due to age related sagging in older people. Often it is a combination of both. This double chin may often fail to disappear even after weight loss as the skin sagging is not reversible on its own. There are treatments that can help you tighten your double chin and provide a lifting effect. High intensity focused ultrasound (HIFU) can tighten sagging skin by using ultrasound to melt fat and produce collagen fibres. Radiofrequency based treatments are also available which achieve similar effects in saggy skin with heat. Injectable hyaluronic acid based products are also available which can hydrate the skin, tighten collagen or even reshape the chin or jawline to improve sagging and volume loss. The treatments are mostly non or minimally invasive with low downtime and occasional maintenance. Please ask your dermatologist about what single or combination treatment would be suitable for you.