The astringent pulse is characterized by stagnation of Qi, blood stasis, deficiency of fluid and blood. Because of the deficiency of fluid and blood, it cannot moisten the meridians, the blood does not flow smoothly, and the pulse is difficult to move, so the pulse is astringent and weak. For example, chronic bleeding, spermatorrhea, impotence, numbness of the limbs, heart pain and coldness of the limbs, etc. are common due to astringent and weak pulse. It is a deficiency evidence. If Qi is stagnant and blood is stagnant, Qi is not flowing smoothly and blood flow is obstructed, then the pulse is astringent and strong. For example, if there is a mass in the abdomen or an accumulation of obstruction in the abdomen, it is common to have an astringent and strong pulse, which is a real evidence. Causes: Clinically, the formation of astringent veins is mainly due to the increase in blood viscosity and viscosity. It is often measured that the whole blood specific viscosity, whole blood reduced viscosity, and blood cell pressure product values are all increased and the blood sedimentation value is decreased in astringent veins. Blood flow is reduced, peripheral resistance is increased, and blood flow is slow, resulting in astringent veins. It can be seen in hyperlipidemia, erythrocytosis, arteriosclerosis, and severe diarrhea and dehydration. When the astringent pulse is seen together with the thin pulse, the patient is suffering from severe vomiting and diarrhea with a deficiency of fluid and blood, not only with dehydration but also with the sign of shock and a serious lack of blood volume. If the astringent pulse is seen in combination with the chordal pulse, it is characterized by Qi stagnation and blood stasis, which can be seen in coronary heart disease, pulmonary heart disease, arteriosclerosis, hyperlipidemia, etc.