I've suffered migraines for years but they've suddenly become more frequent and are affecting my vision. My GP isn't concerned... should I be? DR SCURR reveals hidden condition that affects so many - and test you MUST ask for

A person suffering from migraines is concerned about their increasing frequency and effect on vision, despite their GP not being concerned. The article suggests a hidden condition may be the cause. The author, DR SCURR, advises on a test to ask for.