What are the common symptoms of a migraine?

The most common symptoms of migraine are a debilitating headache, often on one side of the head, nausea, digestive problems, neck or shoulder pain, visual disturbances (blind spots, tunnel vision and the seeing of flashing lights), ringing in ears, olfactory hallucinations, feeling cold, excessive sweating and mood changes. Many migraine sufferers can predict the onset of a migraine by the presence of one or more of these symptoms. Preventative steps can then be taken.