Raised pressure in the cerebro-spinal fluid surrounding the brain. Due to masses within the skull (eg tumours, haemorrhage), blockage of the drainage system for the fluid (eg previous meningitis, thrombosis), severe hypertension or for no clear reason (benign intra-cranial hypertension).
Clinical Features
Headache, typically worse in the morning or after lying
Nausea and vomiting
Horizontal double vision
Swelling of the optic nerves as they leave the eye (optic disc papilloedema)
