Lao He Cao is bitter, pungent and flat, and belongs to the liver, kidney and large intestine meridians. Its main function is to dispel wind-dampness, and is mostly used for patients suffering from rheumatic paralysis. It is used for wind-damp paralysis and pain, numbness of limbs and unfavorable joints, etc. It is effective when used alone, decocted in water or boiled in ointment. In clinical practice, it is often combined with Gui Zhi, Radix Angelicae Sinensis, Hong Hua, Paeoniae and other Chinese medicines, mainly to enhance the effect of activating blood circulation, promoting circulation and relieving pain. In clinical practice, it is often combined with peach kernel or worm medicine to enhance the effect of invigorating blood, promoting circulation and dispelling wind.