What Is The Treatment Of Blackened Eye If Had Hit On Head ?

I have a friend who suffered a blow to the head, as a result she had a blackened eye and a lump on her head, the lump has gone down some but is still palpable, she has told me that she often forgets what day it is, also, she has not noticed, but she tells me the exact same story every day as if it were the first time and she always starts it off the exact same way, I am concerned for her health and was wondering, based off what I have told you, if you could give me your opinion on what you think might be wrong with her? Her memory has definitely been affected so I know there has got to be some kind of brain injury, sounds kind of like dementia of some kind to me but I m no doctor.