If you have allergies – and you get migraines – that’s not a coincidence. People with allergy symptoms are 30% more likely to get migraines. And they tend to be more frequent and severe. Researchers say it’s because the trigeminal nerve is involved in both responses – and it’s the main sensory nerve in the face. It also interprets some stimuli – like a runny nose or itchy eyes – as pain, triggering a headache. The good news is: The meds that relieve allergies can lessen your head pain, too. And people who get allergy shots can cut the frequency and intensity of their migraines in half!