A double chin occurs when the platysma muscle becomes slack and loses mass. This can make you appear to be middle aged, and also rather unhealthy. Obesity can contribute to a double chin, and losing weight can help.
Learn how to go after your goals, even when you really don't feel like it. It all starts with taking baby steps each day until it becomes a habit. This helps when you're trying to break bad habits that were caused by your anxiety and/or depression.