Weak pulse has different etiologies and different symptoms. Commonly, there are spleen qi deficiency, kidney yang deficiency, stomach qi deficiency, and so on. Spleen qi deficiency: It is caused by deficiency of spleen qi, which may result in a slow or weak pulse, accompanied by symptoms such as loss of appetite, bloating, and a feeling of fullness after meals, as well as a yellowish (yellowish and lack of luster) or yellowish complexion. Kidney Yang Deficiency: It is caused by the deficiency of kidney yang, and may present with the phenomenon of sunken and weak pulse. Clinical symptoms such as dizziness, lumbar and knee tenderness (a feeling of soreness and weakness in the waist and knees), coldness of the limbs, and increased nocturia may occur. Weakness of Stomach Qi: Weakness of Stomach Qi can be characterized by a weak pulse. Clinical symptoms are often characterized by vague pain and distension in the stomach, which may be relieved after eating or drinking. Weak pulse should be comprehensively diagnosed by a professional doctor and treated with the principle of evidence-based treatment to avoid delaying the condition.