The Student Room Group

Headache caused by release of Histamine?

I've been having a recurring headache for the past four days following a bad allergic reaction I had to my friends springer spaniel (my chest closed up really badly, and I had a headache following that). I was just wondering if the continued headaches could be caused by the amount of histamine that was released during that allergic reaction (and if it could still be in my blood), or should it have cleared up by now?