Dang Gui Si Ni Tang's main function is to warm the channels to dispel cold, nourish the blood, promote blood circulation, invigorate pulse, and alleviate pain. The formula is used to treat the following symptoms: deficiency of blood due to the accumulation of pathogenic cold, cold limbs due to stagnation of blood circulation and channels, and syncope due to a faint pulse. Clinically, the formula is commonly used to treat diseases such as Raynaud’s disease, thrombophlebitis, chilblain, menorrhagia and chronic rheumatic arthritis.