A healthy tongue is above the palate.

Tongue touching the palate means that the tip of the tongue touches the palate gently, that is, the tongue touches the palate gently. It means that the tip of the tongue should be gently pressed between the upper gingival teeth. Qi Gong believes that this is a bridge between Ren and Du, commonly known as "building a magpie bridge". Traditional Chinese medicine believes that the Du meridian runs along the back, and the Du meridian has yang veins all over the body, which is the sea of yang veins; Any pulse runs along the abdomen, and there is always a yin pulse, which is the sea of yin pulses. From the tongue to the palate, it can communicate the two meridians of Ren and Du, so that the meridians of the whole body are connected and the upper and lower qi is smooth. "Tongue reaching the upper jaw" can dredge qi and blood, access meridians, refresh the mind, strengthen the body, and also help to produce more body fluids to moisten the throat. The principle of tongue against palate: "When the mouth is closed and the teeth are closed, the gums are naturally attached to the tip of the tongue and in front of the tongue." Some people say: the right tongue reaches the upper jaw, and the mouth makes an "er" sound, and the place where the tip of the tongue reaches is. Saliva can bring chemical protection to teeth, and amylase contained in it can help digestion, resist bacteria and clean the mouth. It has the functions of anti-inflammation, promoting digestion, antivirus, autoimmunity and activating antibacterial cell activity.