Michaels was rushed to the hospital last Thursday after suffering from a headache that he reportedly likened to being "hit in the head with a baseball bat over and over again." Doctors diagnosed a subarachnoid hemorrhage (see below). By Friday, Michaels was apparently alert enough to talk to his father by phone. Wally Sychak told Radar Online that his son was, "upbeat and positive but [doctors] had him sedated."
What is a subarachnoid hemorrhage?
Bleeding into the subarachnoid space—the area between the arachnoid membrane and the pia mater surrounding the brain. This may occur spontaneously, usually from a ruptured cerebral aneurysm, or may result from head injury.
Sudden or decreased consciousness and alertness, difficulty or loss of movement or feeling, mood and personality changes, including confusion and irritability, muscle aches (especially neck pain and shoulder pain), nausea and vomiting, photophobia (light bothers or hurts the eyes), seizure, stiff neck and vision problems, including double vision, blind spots, or temporary vision loss in one eye.
How well a patient with subarachnoid hemorrhage does depends on a number of different factors, including the location and extent of the bleeding, as well as any complications. Older age and more severe symptoms from the beginning are associated with a poorer prognosis.
Complete recovery can occur after treatment, but death may occur in some cases even with aggressive treatment.