Hi Had my 1st round of Botox just over a week ago. It appears to have helped my headaches quickly, making me think that the muscle tension in my head and neck must be a big cause. Had first migraine today but i am wondering if this is caused by the other side effects. I have the droopy eyelid and tightness around my temples and forehead. It doesn't bother me cosmetically but the pressure of my left eyelid drooping onto my eyelashes is actually very uncomfortable and is i think ironically making my muscles tense! Also i have felt very tired, floppy all over and a bit sniffly. i know some of these can be side effects but not sure how likely that is and if so...How long will it take for the tiredness and general floppiness to wear off as it is affecting my functioning.