There's no single cause of nasal polyps. They grow from swelling inside your nose that lasts a long time. Over time, this swelling turns soft tissue into small, grape-like growths.
In some people, this is linked to asthma and a sensitivity to aspirin — a condition called aspirin-exacerbated respiratory disease. In others, allergies are involved. Sometimes there's no clear cause at all.
Knowing what's driving your polyps helps us pick the best treatment. That's why we look beyond the polyps themselves.