The blue eg not caused by drinking too much alcohol or caffeine then its good idea to see doctor.
Headache associated with fits and neck rigidity in meningitis it is again generalised severe headache associated with fever both conditions may get atypical symptoms.
Headache associated with fever and neck rigidity in brain inflammation what you call encephalitis it is usually very severe headache associated with fever and loss of consciousness in brain inflammation what you call encephalitis it is usually very severe headache associated with fever and neck rigidity in meningitis it is usually very severe.