we went to see the doctor yesterday and he said that the skull hasn't been broken or fractured. along with this he took a blood pressure reading and this was fine, at a normal level. he just said to look out for the symptoms of a severe injury for the next couple of days or so in case i.e vomiting etc.
however i forgot to ask him how long would it take for internal bleeding to the head to take effect on a person if they had it (max time). i'm just probably overly cautious as he is my younger brother and seeing its been over a week now he should be pretty much fine.
thanks for all your help, very much appreciated!