Chinese medicine says that "the head is a smart family" and "the essence of the five internal organs" rises to the head. The scalp is the protective layer of the brain, and there are many acupoints. In the the twelve meridians of the human body, the three yang meridians of the hands and feet all pass through the head and face, so there is also a saying that "the head is the meeting of all yang meridians". For example, Yangming Meridian of hand and foot is distributed in the front of head and face, Shaoyang Meridian of hand and foot is distributed in the lateral head, and Taiyang Meridian of foot is distributed in the back of head and nape.

People often scratch their heads with their fingers. It can not only dredge the qi and blood in the brain, but also coordinate the function of viscera in the whole body. In addition, there are many acupoints on the scalp, such as Shangxing, Baihui, Naohu, Ding Qian and Jade Pillow. Acupuncture can prevent and treat diseases. Massage these acupoints, although not as intense as acupuncture, is large in area and gentle in action, and can also dredge meridians, thus playing a role in preventing neurasthenia, headache, insomnia, Alzheimer's disease and amnesia, so people often scratch their heads when they are free, especially the elderly and mental workers.

Modern scientific research has proved that regular scalp massage can stimulate the capillaries on the scalp, make them expand and thicken, make the blood circulation vigorous, and supply more nutrition and oxygen to the brain tissue. The improvement of scalp blood circulation is also beneficial to the growth and development of hair and prevents hair from falling off and turning white. Old people often massage their scalp, which can prolong life.