Insufficiency of middle qi (weakness of spleen and stomach qi) is mostly caused by insufficient endowment (inborn constitution and poor functioning), improper diet, overwork, prolonged illness, and so on. 1. Inadequate endowment: refers to congenital deficiency and weakness, which is related to heredity and other factors. 2. Improper diet: refers to irregular diet or malnutrition, etc., resulting in insufficient spleen and stomach qi, which makes it difficult to generate qi and blood and leads to lack of qi in the middle. 3. Overwork: refers to long-term engagement in laborious work or mental work, which results in excessive consumption of qi and blood and leads to deficiency of middle qi. 4. Prolonged illness: prolonged illness depletes qi and blood, affecting the functions of the spleen and stomach, resulting in a weakness of the qi of the spleen and stomach, leading to a deficiency of zhong qi. Qi deficiency generally refers to the weakness of the spleen and stomach qi and transport failure, ascending clear and descending turbid (so that the clear qi rises, turbid qi falls) function decline, often manifested as a less colorful face, loss of appetite, abdominal distension, dizziness, low voice shortness of breath, fatigue (fatigue and weakness), loose stools (feces sparse and unshapely), and so on, the treatment of the main tonic to strengthen the spleen. If there is a lack of middle-vitality, one should go to the hospital in time, and after a clear diagnosis, the doctor will arrange a scientific treatment plan, and should not take it lightly or handle it on his own, so as to avoid a delay in the condition.