Botox works on dynamic muscles. Most often on the chest people get lines, wrinkles, and creases from sun damage, and not from muscle movement. So, if you look in the mirror and you have the lines when you are standing still doing nothing, then these would be static lines that Botox cannot treat. If you have the creases only when you are moving muscles, then Botox could be an option, though this would be extremely off-label. I would more likely recommend a fractional laser treatment like InMode Fractora to treat your chest lines and creases, which I much more assume is from sun. "This answer has been solicited without seeing this patient and cannot be held as true medical advice, but only opinion. Seek in-person treatment with a trained medical professional for appropriate care."