Right anterior cerebral artery segment A1 luminal stenosis may be asymptomatic or may present with symptoms such as headache, dizziness, lethargy, and weakness. Right anterior cerebral artery A1 segmental stenosis refers to a narrowing of the beginning segment of the right anterior cerebral artery, and if the stenosis is relatively mild, the patient may have no obvious symptoms. If the stenosis is relatively severe, the patient may experience symptoms such as headache, dizziness, lethargy, and weakness. Luminal stenosis of the right anterior cerebral artery A1 segment may be caused by a variety of factors such as congenital anterior cerebral artery developmental abnormalities, localized lipid plaque formation, diabetes mellitus, hyperlipidemia, and hypertension. When the right anterior cerebral artery A1 segment luminal narrowing is found, it needs to be treated according to different causes under the guidance of professional doctors.