Hemorrhagic strokes can manifest for a number of reasons and are attributed to the following: arterial hypertension, aneurism, vascular malformation, brain tumor…I'll need to know more about the cause of your friend's hemorrhagic stroke to help you more. In general, a dent in the skull can’t be attributed to hemorrhagic stroke because hemorrhages affect the brain and not the skull. Skull dents, however, can be due to skull injury (impressive skull fracture, for instance). Your friend can go to her GP to examine the skull dent and verify its presence and seek treatment for the pain she is experiencing.