this could be an adverse reaction to the anesthesia. you did not specify was it local or general anesthesia? either way you need to advise your doctor of any reaction to anesthesia to be on the safe side.
why do i have a numb face after anesthesia? . i had a brain tumor removal surgery 3 months ago. the anesthesia is still affecting the left side of my face. it is numb and puffy is this normal and will it go away or is it a serious side affect that will never go away?