Advertisement

Why do I have a headache, days after an allergic reaction?

Headaches can be caused by a number on things, a couple of which may be stress and sinus congestion. Seasonal allergies can cause nasal congestion. Generalized allergic reactions can cause a stress reaction, which can lead to headaches. These headaches do not always represent sinus infections and can be normal. These usually resolve with relief of the allergy symptoms.

Continue Learning about Allergies

6 Ways to Beat Spring Allergies
6 Ways to Beat Spring Allergies
There’s nothing like the warm, spring weather to make you want to step outside—but there’s also nothing like nasty pollen allergies to make you want t...
Read More
What is a drug allergy?
Univ. of Nev. School of Medicine, Family MedicineUniv. of Nev. School of Medicine, Family Medicine
A drug allergy occurs when your immune system reacts to a medication in the same way it would react ...
More Answers
5 Surprising Allergy Triggers
5 Surprising Allergy Triggers5 Surprising Allergy Triggers5 Surprising Allergy Triggers5 Surprising Allergy Triggers
Watch out for these unexpected causes of allergy flare-ups.
Start Slideshow
Is There a Way to Prevent Allergies?
Is There a Way to Prevent Allergies?

Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.