A migraine aura refers to a set of reversible neurological symptoms that some people experience before the onset of a migraine headache. These symptoms usually develop gradually over a few minutes and typically last less than an hour. Migraine auras can affect various senses, but the most common type is visual, resulting in disturbances in vision. Examples include seeing flashing lights, zigzag lines, blind spots, or experiencing temporary vision loss. Other aura symptoms may involve tingling or numbness in the face or extremities, difficulty speaking, or confusion. Not everyone with migraines experiences an aura, and migraines can occur with or without this pre-headache phenomenon.