greetings friend, I will reassure you that with a normal CAT scan that your sister is probably going to be fine minimal numbness
or at most a few days. This is part of potentially a postconcussive syndrome or concussion
, which will resolve on its own. Just be careful to make sure your sister does not have any decreased alertness or confusion in the hours ahead which could suggest a delayed bruise
on the brain or subdural hematoma
which is rare but needs immediate medical attention. I would not be concerned at all about the numbness. It is just because the inflammation locally where she hit her head is compressing a nerve
, which will resolve on its own soon. Have a good rest of your day.