You will likely need to stay in the hospital if: Emergency or more severe symptoms of head injury are present; Skull fracture; There is any bleeding under your skull or in the brain. Outlook (Prognosis). Healing or recovering from a concussion takes time. ...
Scientists concluded that the average human body contains approximately 37.2 trillion cells! Of course, your body will have more or fewer cells than that total, depending upon how your size compares to the average human being, but that's a good starting point for estimating the number of cells in your own body.
Please note that the answer listed here - over 400,094,800 - refers to the number of cells in the human brain. The 100 billion figure, mentioned repeatedly in the sources quoted above, refers to neurons or nerve cells, which are only one kind of brain cell.