Symptoms of blood deficiency are characterized by a white face, eyelids, tongue and a thin pulse. Blood deficiency refers to the deficiency of blood, which cannot nourish the internal organs, meridians and tissues, and is mainly manifested as pale or yellowish color, pale eyelids, lips, claws and nails, accompanied by dizziness, blurred vision, dryness of the eyes, palpitation, insomnia, forgetfulness, lack of mental energy, numbness of the hands and feet, women’s menstruation is scanty and pale, or even amenorrhea, with a pale tongue, white moss, and a thin, feeble pulse. Blood deficiency can be treated with Si Wu Tang, which is composed of Radix Rehmanniae Praeparata, Radix Paeoniae Alba, Rhizoma Ligustici Chuanxiong and Radix Angelicae Sinensis. In this formula, Radix Rehmanniae Praeparata, Radix Angelicae Sinensis and Radix Paeoniae Alba have the effect of nourishing the blood, while Rhizoma Ligustici Chuanxiong has the effect of activating blood. The adverse effects of Si Wu Tang have not been clarified, and it is contraindicated in allergic patients. If symptoms of blood deficiency occur, consult the clinician and follow the doctor’s advice.