Weak ulnar pulse may be caused by kidney yin deficiency, kidney yang deficiency, kidney essence deficiency, etc. It needs to be analyzed specifically. 1. Kidney yin deficiency: If the weak ulnar pulse is accompanied by heartburn, lumbar and knee pain, dizziness, tinnitus, and heatiness in the hands and feet, it may belong to the evidence of kidney yin deficiency. 2. Kidney yang deficiency: If the weak ulnar pulse is accompanied by fatigue (mental exhaustion and physical weakness), lumbar soreness and fear of coldness, and long and clear urination, it indicates the presence of kidney yang deficiency. 3. Deficiency of kidney essence: If the weak ulnar pulse is accompanied by retarded physical development, impotence, infertility, irregular menstruation, etc., it indicates the existence of deficiency of kidney essence. If there is a weak ulnar pulse, you should consult a doctor in time, under the guidance of the doctor to take the appropriate method of diagnosis and treatment, do not take medication.