i had my first Kybella injections 6 days ago. How long until my neck stops jiggling?

The "jiggling" is due to the swelling of the area after kybella injection.  The worst is generally over by 3-4 days/ It may take 3-4 weeks to get back to your baseline contour.  The jiggling is generally gone by 2-3 weeks.  I had a treatment myself with 3 vials and the jiggling was gone by 2 weeks.    I will say that no one else noticed after 3-4 days.  

Great question! Swelling typically occurs one to two days after treatment with Kybella, and can last up to 1-2 weeks. The most commonly reported side effects are bruising, redness of the area and numbness, all of which subside spontaneously in a short period of time. Since it has only been 6 days following your injection I encourage you to allow some more time to pass before you are able to see your Kybella results. Good luck! 

Kybella works well for fat reduction in the neck. Most people get the "Jello" effect I call it, the jiggles, from the temporary swelling. Although the swelling lasts for 3- 4 weeks for many patients, and is less each week, the jello shaking often is gone by the end of the first week, or second for some.