Poor appetite simply means not eating well. In Chinese medicine, it is classified as a disease of the spleen and stomach and is caused by a variety of reasons. It can be caused by a variety of reasons, such as injury caused by food, often manifested as belching sour gas; and then caused by dampness, often manifested as stomach distension, white and greasy tongue coating; and also caused by low digestive function, known as spleen and stomach weakness in Chinese medicine, in addition to reduced food intake, clinical symptoms such as abdominal distension after eating, atrophy, shortness of breath and lazy speech, and thin stools. Poor appetite can be easily confused with the following symptoms: liver qi offending the stomach, loss of appetite: lack of desire to eat and drink, erratic belching, mental depression, chest distension or distension, and stringiness of the pulse. Loss of appetite due to dampness and heat in the spleen and stomach: vomiting and anorexia, stuffiness in the stomach and abdomen, fatigue and lethargy, loose and unpleasant stools, yellow and short urine, red tongue, yellowish white and greasy coating, moist and smooth pulse. Stomach Yin deficiency with loss of appetite: hunger without appetite, thirst with thirst for drink, red and dry lips, dry stool, short urine, red tongue, little coating, thin and slightly counted pulse. Loss of appetite due to deficiency of Qi in the spleen and stomach: not thinking about eating, abdominal distension after eating, or vomiting after eating a little, short of breath, lazy speech, tiredness and less energy, light tongue with white fur, slow and weak pulse. Deficiency of appetite in the spleen and stomach: tasteless eating, not knowing hunger, stuffy abdomen and vomiting after eating a little, vague pain or paroxysmal pain in the abdomen and stomach, warmth and fear of cold, relief when pressed, fatigue and shortness of breath, unheated limbs, loose stools, pale tongue with white fur and sunken pulse. Spleen and kidney Yang deficiency loss of appetite: light mouth, white face (white plus light) white, short of breath and lazy speech, fatigue and tiredness, fear of cold limbs, abdominal distension or abdominal pain, lumbar soreness and leg weakness or swelling of the limbs, complete grain does not change or five night diarrhea, light tongue and fat body, sunken and weak pulse. Injury appetite loss: anorexia, belching and swallowing acid, cavity and abdominal fullness, foul stools or constipation, thick and greasy tongue coating, smooth pulse.