Can Botox under the right eye cause cheek drooping?

Thank you for your question.  Botox works by weakening the targeted muscles.  If the product is inadvertently injected into a muscle that elevates the mouth/cheek, i.e. your smile muscles, then it might cause a change in your smile or possibly a droopy look to the cheek.  I have seen this in patients who come and say they had Botox for their crows feet or under their eyes.  I would recommend that you visit with an injector who is very well versed in the underlying anatomy and experienced with Botox.  I train a lot of other injectors on how to inject Botox and fillers and am quite surprised by how much time I need to spend on teaching anatomy and what can go wrong if we inject too low, high, deep or superficial in a given area.  Facial muscles are quite small and reside in specific layer of our facial tissues so the more precisely we can deliver Botox, the more likely you will achieve the desired result.  Best of luck.

If injected into the wrong area, the answer to your question is yes. I would recommend follow up with your injector for an evaluation.

Thank you for sharing your question.  If Botox is placed too low along the eyelid it may affect the muscles of the face responsible for maintenance of cheek position and lip elevation.  Be sure to see an ASPS board certified plastic surgeon in order to minimize these complications.