Clinical changes at the time of hyponatremia Among 180 cerebral hemorrhage patients with hyponatremia, 87 patients had hyponatremia from the second day after admission, we compared some clinical symptoms at the time of hyponatremia occurrence: Headache: 40/59 patients (67.79%) still had a headache at the time of hyponatremia, 5/41 patients (12.19%) had an increase in head level. Perceptual status (Glasgow): 17/87 patients (19.50%) had the cognitive deterioration, 42/87 patients (48.27%) had the unchanged perception status; thus worsening perception is a hyponatremia symptom in patients with cerebral hemorrhage, especially when these patients have no change in brain lesion on CT or MRI of the brain.