Warm cough medicines mainly include hemixia, tiannanxing, mustard seeds, etc. These medicines are warm and dry in nature, and have the function of warming the lungs to stop coughing (to stop coughing by warming the lungs), drying dampness and resolving phlegm (to remove phlegm in the body by drying dampness medicines). 1. Semixia: It has the functions of drying dampness and resolving phlegm, lowering rebelliousness and stopping vomiting (stopping the upward flow of stomach qi and vomiting), and eliminating lumps and dispersing knots. This product is pungent, warm and dry, and is good at drying dampness and resolving phlegm, which is an important medicine for drying dampness and resolving phlegm, and warming and resolving cold phlegm. Half-summer is poisonous, usually used after concocting for internal use, and caution should be exercised in taking raw products internally. Pregnant women should be cautious. 2. Tiannanxing: It has the effects of drying dampness and resolving phlegm, dispelling wind and relieving spasm (treating spasm by dispersing wind evil), dispersing knots and subduing swelling. This product is bitter, pungent and warm, with strong drying dampness and phlegm, good treatment of cough and phlegm, stubborn phlegm obstructing the lung. Tennant is poisonous, and should be used for internal use. Pregnant women should be cautious. 3. Mustard Seed: It has the efficacy of warming the lungs and removing phlegm, dispersing knots, and relieving pain (dredging the meridians and relieving pain). This product is pungent, warm and forceful, can warm the lungs cold, facilitate qi, exclude phlegm and saliva, can treat cold phlegm congestion of the lungs, coughing and asthma. It is not recommended for people with lung deficiency and cough, or those with yin deficiency and fire exuberance (deficiency of yin essence in the body, resulting in hyperactive fire). This product is toxic and caution should be exercised when taking it internally. If you need to use the medicine, it is recommended to consult a professional physician, do not blindly use the medicine by yourself.