This chapter discusses neurological emergencies, including coma, limb weakness, acute dizziness, acute loss of vision, painful red eye, acute bacterial meningitis, acute viral encephalitis, head injury, raised intracranial pressure (ICP), intracranial space-occupying lesion, haemorrhage (intracerebral, extradural, subdural, subarachnoid), status epilepticus (tonic–clonic), stroke, cerebral infarction syndromes, brainstem stroke, cerebellar stroke, transient ischaemic attacks (TIAs), confusional states and delirium, acute alcohol withdrawal, neuromuscular respiratory failure, myasthenic crises, spinal cord compression, Guillain–Barré syndrome (GBS), botulism, tetanus, the Glasgow Coma Scale (GCS), examination of brainstem function, and brain death.