If you were told “1,000 units,” clarify exactly which product was used, how many units of that specific product were injected, which facial areas were treated, and whether the number referred to units or volume. A change in facial appearance after Botox may reflect temporary muscle relaxation, altered facial expression, swelling, or normal changes in weight, but it is not Botox-related body-weight gain. If you have already received treatment and develop generalized weakness, trouble swallowing, difficulty speaking, shortness of breath, double vision, or drooping eyelids, seek urgent medical evaluation. These are uncommon but important potential toxin-related symptoms.