Associated symptoms
Aura (visual, auditory, gulstatory) - migraine
Photophobia - meningitis, migraine
Neck stiffness - meningitis/encephalitis, SAH
N+V - acute glaucoma, raised ICP, migraine
Fever - meningitis, encephalitis, GCA, tropical illness
Altered GCS - meningitis, encephalitis, SAH, raised ICP
Focal neurology - encephalitis, raised ICP, tumour
Personality change - encephalitis, tumour, raised ICP
Seizures - encephalitis, tumour, raised ICP
Visual change - acute glaucoma, raised ICP
Local tenderness - tension, sinusitis, GCA, TGN
Rash - meningitis
Jaw claudication - GCA
Corzyal symptoms - sinusitis