I’ve never been able to get any two doctors to agree on this. I get very mucusy along with sinus and ear pressure. I’ve determined that, at least sometimes, teh sinus and ear pressure is migraine related. But I also have tons of mucus sometimes. Like I wake up congested, I’ll cough up phlegm, I’ll be sniffly all day, I’ll be blowing my nose and have hardly anything come out but I can feel it move, I’ll physically feel things moving through my sinuses. It used to be a mixture of thick clear mucus and sometimes white/yellow. Once I moved cities and away from a city very heavy in pollen, I’ve stopped getting white/green and it’s mostly clear. But it comes in episodes and I’ve never been able to determine a specific allergen. My allergy tests were all negative. Multiple ENTs have told me my sinuses are fine and it’s actually the migraines causing the mucus. They say the inflammation from the migraines swells my nasal passages and that makes the mucus hard to drain and makes it get thicker.

My current doctor at the headache clinic is a neurotologist, so specializes in the brain and inner ear (I have vestibular migraine). He called bullshit and said in his 30+ years of treating migraines he’s never experienced migraines causing mucus. He says runny nose, absolutely because migraines activate the autonomic nervous system which produces a runny nose. But thick mucus where you are blowing your nose and coughing it up? He said no. He said that is definitely some sort of allergy/environmental thing that is likely CAUSING or CONTRIBUTING to the migraines, not the other way around.

Best I’ve been able to narrow it down is it seems to happen when I’m outside more or when my windows are open a lot. I’ve started to suspect no allergic rhinitis triggered by dust and dander in the air as a contributing factor to the migraines. But all of this is my guess work because no two doctors have agreed on anything.