Description:
Headache caused by and occurring in association with other symptoms and/or clinical signs of a systemic viral infection, in the absence of meningitis or encephalitis.
Diagnostic criteria:
- Headache of any duration fulfilling criterion C
- Both of the following:
- systemic viral infection has been diagnosed
- no evidence of meningitic or encephalitic involvement
- Evidence of causation demonstrated by at least two of the following:
- headache has developed in temporal relation to onset of the systemic viral infection
- headache has significantly worsened in parallel with worsening of the systemic viral infection
- headache has significantly improved or resolved in parallel with improvement in or resolution of the systemic viral infection
- headache has either or both of the following characteristics:
- a) diffuse pain
- b) moderate or severe intensity