most probably is subdural hematoma(As the brain shrinks with age, the subdural space enlarges and the veins that traverse the space must travel over a wider distance, making them more vulnerable to tear)
overall prognosis depend upon current heart status, glass go coma
scale, size of bleed
The recovery time varies from 1 to 4 weeks. Full recovery may take up to 8 weeks.
Postoperative complications include increased intracranial pressure, brain edema
, new or recurrent bleeding, infection, and seizure