If you feel a dull, steady pain that feels like a band tightening around your head, you may have a tension headache.
If you feel throbbing that begins on one side and causes nausea or sound/light sensitivity, you may have a migraine. Visual disturbances, such as flickering points of light, may precede a migraine headache.
If you feel a severe pain around one red, watery eye, with nasal congestion on that side of your face, you may have a cluster headache.
If you feel a steady pain in the area...
The clinical presentation of drug-induced aseptic meningitis is the same as that of viral meningitis. Cerebrospinal fluid findings are the same as those in viral meningitis, except for a neutrophil predominance; however, in cases induced by intravenous immunoglobulin, eosinophils are present.
WebMD Medical Reference from WebMD Scientific American Medicine