There are several methods to examine the blood vessels in the neck: 1. Perform a specialist examination. If the blood vessels in the neck can be palpated with irregular beating, or even hear a vascular murmur or palpate a tremor, it proves that the blood vessels in the neck have organic lesions. 2. Doppler ultrasound. It is the simplest, non-invasive and most widely used examination, and its sensitivity and specificity are also higher. 3.Vascular imaging. CT, or magnetic resonance angiography is routinely applied to clarify the degree of occlusion within the vessel, and the relationship with the surrounding tissues and organs. To clarify whether there is external compression of blood vessels, causing narrowing of blood vessels. 4.Angiography. It is the gold standard for examining the blood vessels in the neck, and can visually and accurately, see the condition of lesions within the vessels, and the degree of lumen narrowing and occlusion, or the presence of dilated diseases such as aneurysms.