Allergist Nancy Joseph, DO: Yes, allergies can absolutely cause headaches, and the main way they do that is via ways of your sinuses. So, your sinuses are basically spaces in your head, and they’re there for multiple reasons. But one of the reasons that they’re there is they’re lined with a thin layer of mucus that’s there all the time. It drains in your nasal passages, eventually in back of your throat, but it circulates just in general throughout the day regularly. It traps dirt. It traps environmental allergens like pollen, things like that.
However, there are times when you can get irritants and things like when you have environmental allergies that can cause inflammation of those sinuses. And so then when inflammation occurs, it causes swelling of your sinuses that then blocks those passages to where it drains.
Then after that, you’ll get sinus pressure. You’ll get increased mucus production and that’s how you would get a pressure headache, tenderness of your sinuses. And your sinuses are located in your forehead, your cheeks, behind your eyes and that’s why often times people will feel that headache will be more intense in those areas. And those are reasons or a couple of ways that environmental allergies can cause headaches.
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Resource Type: Video | Allergy, Allergy Symptoms
