Recurrence of cerebral infarction is related to cerebral artery narrowing and thrombosis caused by cerebral atherosclerosis. Common causes of cerebral atherosclerosis include hypertension, diabetes mellitus, dyslipidemia, homocysteinemia, as well as smoking, alcohol consumption, obesity, and poor work and rest habits. If you have been taking the medication for cerebral infarction, and the way you take the medication is correct, but you still have a relapse, it is likely that the blood pressure, blood sugar, blood lipid or homocysteine level does not reach the standard, or you still smoke, drink alcohol, and have a poor lifestyle and diet. Even if you take medication for a long time, the above-mentioned indicators are not controlled and the degree of cerebral atherosclerosis will still worsen, eventually causing arterial stenosis and thrombosis. There is another situation, even if you have been taking medication, such as aspirin commonly used in cerebral infarction, some patients have aspirin intolerance, that is, it does not work as it should, so you should change the medication in time, and you can replace it with clopidogrel or other drugs for substitution.