I would like to treatment with a 2 ml Kybella vial: how long will the double chin be swollen? (Photo)

Swelling will gradually resolve, but can last up to 6 weeks. Keep in mind, most people need more than one treatment with Kybella. Hope this helps.

Swelling post Kybella treatment can last up till six weeks even though the majority of the swelling will be gone much much sooner.