Red dragon stirring the sea is a kind of health-preserving exercise in traditional Chinese medicine, which is mainly aimed at the movement of the tongue. Through the circular rotation of the tongue in the oral cavity, saliva secretion can be promoted, and the face shape of some patients with dry mouth, oral ulcer, gingivitis and pharyngitis can be improved.

According to the theory of traditional Chinese medicine, saliva gushes from the oral wall, passes through the root of the tongue, throat and lungs, turns to the liver, enters the kidney meridian, is stored in the abdomen, and then turns into essence. It has the functions of harmonizing spleen, invigorating stomach, moistening dryness and orifices, moistening limbs and five internal organs, strengthening kidney, tonifying yuan, smoothing joints and nourishing brain marrow.