Papilledema: swelling of the optic nerve.
Papilledema can be a symptom of pseudotumor cerebri, aka idiopathic intracranial hypertension (IIH).
You can read more about papilledema, and IIH in:
For more terms, see our Migraine and Headache Glossary.
Medical review by John Claude Krusz, PhD, MD.

