Thermal imaging allows us to determine surface temperature of objects. Because arterial blood flow is warmer than the surrounding areas of the ear and the caudal side of the ear has limited tissue covering the arteries, arterial blood flow is visible in thermal images. This paper aims to locate a particular point of consistent blood flow in the ear. The point chosen to evaluate is where the lateral auricular artery spreads such that it is no longer parallel to the apex ridge of the ear. Thermal images were evaluated to determine a ratio between the total length of the ear and the length from the base to the bend in the artery. In evaluating 62 samples, the distance ratio is 30% with a standard deviation or" 5%. Many studies have considered the ear an appropriate point to monitor health. By placing health monitoring equipment on or near an artery may give more accurate or more consistent results.