Classically, head pain related to elevated intracranial pressure (ICP) is thought to worsen with maneuvers that increase ICP, such as lying down, bending over, coughing, or Valsalva maneuvers.

Bleeding in the brain is also called an intracranial haemorrhage ... and can exert pressure on the midline, causing shift (of the midline) towards the opposite side. This results in pressure ...