Hi welcome to Health care magic forum. After viral fever
it is commen to have sinusitis
and related headache in some cases.
Other causes are hypertension
, hypertensives, tensions, etc, any how the treating doctor will be the correct judge. and the treatment is also justified to the symptoms.
i also advise you to follow some diet recommendations as avoid taking more of fruits, juices, ice cream, ice water, etc till you get the relief of headache.
Most important is avoid thinking more and feeling tensions etc.
Wishing you quick recovery from headache and thanks for calling.