It is
not a stroke, although sudden new weakness, facial droop, speech difficulty, or vision loss should always be treated as a possible stroke and assessed urgently. DLB progresses over time rather than appearing suddenly. The
National Institute on Aging overview describes the cognitive, movement, sleep, behavioral, and autonomic features.
Diagnosis is clinical, usually by a neurologist or memory specialist, supported by history, cognitive assessment, examination, medication review, and sometimes brain imaging or specialized tests. There is no cure yet, but treatment can help cognition, movement, sleep, hallucinations, blood-pressure symptoms, and caregiver support.