It is normal to measure blood pressure differently in both hands. For normal people, as long as the blood vessels are closer to the heart, the higher the measured blood pressure will be. The normal anatomy is that the blood ejected from the heart first passes through the ascending aorta and then divides into the cephalic trunk, the left internal carotid artery, and the left subclavian artery, which in turn divides into the right subclavian artery, because the right subclavian artery is closer to the heart than the left subclavian artery, so according to the principle of pressure conduction the closer the blood vessel is the higher the blood pressure is, so most normal people have higher blood pressure in their right hand. However, if there is a congenital variation, peripheral vascular disease or vasculitis, the above situation is different, and the blood pressure is generally lower or even undetectable if there is a stenosis in the diseased vessel.