Welcome to Health care magic
I went through the history you have posted.
It seems your father is having subdural hemorrhage
Sub-dural hemorrhage requires treatment to prevent raise of intra cranial pressure and other associated complications. The treatment options are either medical in the form of reducing the intracranial pressure by use of drugs like mannitol, glycerol
or by surgical drainage
of the hemorrhage.
Do consult your doctor for further evaluation and treatment.
Do write back to me for further questions.
Thank you for writing to health care magic.