Cynanchum has the effect of clearing the nose, dispelling wind-dampness and dispersing wind-cold. It can be used to treat wind-cold cold, nasal congestion and other symptoms. Cang Er Zi tastes pungent, bitter, warm and toxic. It belongs to the lung meridian of the hand Taiyin. It is effective in dispersing wind-cold, dispelling wind-dampness, relieving pain and clearing the nose. It can be used to treat wind-cold cold, nasal congestion and runny nose, dizziness; it can also be used to treat nasal congestion and runny nose caused by congested nose, as well as treating rubella and dampness paralysis and contracture. Cangzhi can not be overdosed, blood deficiency headache people can not take, adverse reactions have not been clarified. The use of drugs needs to be carried out under the advice of a physician, and if you are not feeling well, you need to go to the hospital in time, do not delay your condition.