A headache, medically known as cephalalgia, is a continuous pain in the head. The pain can be anywhere in the head or neck. The causes for headache can be vascular, muscular, inflammatory or pressure related.
A migraine is a severe, painful headache that is often preceded or accompanied by sensory warning signs such as flashes of light, blind spots, tingling in the arms and legs, nausea, vomiting, and increased sensitivity to light and sound. The excruciating pain that migraines bring can last for hours or even days.