Yin deficiency of the spleen and stomach (insufficient Yin fluid in the spleen and stomach) will have various manifestations such as dryness of the tongue surface, burning sensation, reddish color of the tongue, etc. The severity of the disease is different, and the accompanying patterns will have different manifestations of the tongue. 1. Dry tongue: If the spleen and stomach are deficient in yin, the tongue cannot be moistened with fluid, and the tongue is often dry and cracked. 2. Burning sensation on the tongue: If the spleen and stomach are weak, you will often feel a slight burning sensation on the tongue, and the mouth will often show symptoms of dry mouth and bad breath. 3. Reddish tongue: The tongue color of a normal person is usually light red, while the tongue color of a person with a weak spleen and stomach will be red without moss or with little moss. Spleen and stomach yin deficiency tongue can reflect many of the body’s symptoms, after the discomfort patients should consult a doctor in a timely manner, under the guidance of the doctor’s treatment.