Hi, thanks for responding. No other medical issues at all
I have been having infrequent sinus congestion recently but I've had these headaches with/without the congestion. I suffer from mild hay fever, and only other allergy is penicillin.
Would the instances in which my nose has not been blocked or felt blocked be allergy related as well?
I'm taking over the counter antihistamines at the moment, Cetirizine