The important pathogenesis for the development of hypertension is the imbalance of diet, damage to the spleen and stomach, and the inability to transport and transform water and grain essence, resulting in dampness and phlegm. This causes clear yang not to rise and turbid yin not to descend, making it easy for hypertension to occur. Therefore, it is an evidence of deficiency of the root and the symptoms of the disease. The root is weakness of the spleen and stomach, and the symptoms are liver wind and phlegm. Patients may have dizziness, head weight like hood, tiredness, chest tightness or spitting of phlegm, less food and more sleep, obese body, fat tongue, cloudy and greasy coating, and slippery pulse. It is closely related to phlegm. Physical factors play an important role in the occurrence, development and regression of hypertension. Obese people phlegm-damp constitution is the intrinsic basis for the occurrence of hypertension phlegm evidence, the wind and Yang of liver and gallbladder up for the image of liver Yang strong, liver Yang strong for a long time will hurt the spleen, wood over earth and spleen deficiency is born. If the spleen is deficient in transporting water and dampness, phlegm and phlegm drink will be produced, and the phlegm will follow the liver wind upward, resulting in unclear clear and empty orifices in the head, thus making the head dizzy and the eyes dizzy and the vision rotating. Thus, the occurrence of dizziness is inseparably related to liver wind, phlegm and body deficiency, so phlegm is one of the important pathological mechanisms of hypertension.