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Classic migraines
begin 10-30 minutes before the arrival of the actual headache,
with a phenomenon known as an aura. People experiencing an aura
may feel pins and needles, have trouble speaking, have muscle
weakness, and commonly have visual disturbances — seeing things
such as flashing lights, zigzag lines, bright spots, or a loss of
part of their field of vision. Common migraines aren't preceded by
an aura, but people may experience some mental fuzziness, mood
changes, fatigue, and the unusual retention of fluids beforehand.
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