Kylie Jenner is opening up about undergoing stem cell therapy after experiencing "chronic back pain" for almost three years. The Kylie Cosmetics founder, 28, shared a photo of herself lying in a hospital bed via her Instagram Stories on Wednesday, December 3, and explained her decision to seek medical intervention for her back pain, which she said began after giving birth to her second child, son Aire, in February 2022. (Jenner also shares daughter Stormi, 7, with ex Travis Scott.