The method of measuring head circumference is simple. Pass a tape measure or string around the head, pass through the highest point of the ear and the back of the head, hold both ends of the tape measure or string tightly and read the length of the head circumference. In order to accurately measure the head circumference, the tape measure or string should be as close to the head as possible, and the measurement on the back of the head or forehead should not be too tight or too loose. In addition, in order to improve the measurement accuracy, it is usually necessary to measure many times and take the average as the final result.
The diameter of head circumference has a certain relationship with human health. For example, too large or too small a head circumference may indicate brain dysplasia or disease. At the same time, too large or too small head circumference may also be related to intelligence level, cognitive function and emotional behavior. Therefore, the measurement and evaluation of head circumference can provide an important basis for the diagnosis and treatment of related diseases.