An ischaemic stroke happens when the blood supply to the brain is blocked by a blood clot or fatty material in the arteries.
Studies have shown that people who experience migraines (particularly migraine with aura) have about twice the risk of having an ischaemic stroke at some point compared with people without migraines. But this risk is still small.
It's not clear why ischaemic strokes are linked to migraine.
The risk of having an ischaemic stroke is increased by using the combined contraceptive pill.
Medical professionals generally advise women who experience migraine with aura not to use the combined contraceptive pill.
Women who have migraine without aura can usually take the combined contraceptive pill safely, unless they have other stroke risk factors such as high blood pressure or a family history of cardiovascular disease.
If you take the combined contraceptive pill and experience aura symptoms, talk to a GP about alternative forms of contraception.