When the cough persists after the symptoms of the acute phase of the cold itself have disappeared, it is clinically referred to as post-cold cough, also known as post-infectious cough. Its pathogenesis is not well understood, but it is generally thought to be due to airway inflammation caused by infection with or without transient airway hyperresponsiveness. The clinical manifestations are mainly an irritating dry cough without sputum, or a small amount of white mucus sputum, unpleasant sputum, unfavorable pharyngeal closure, pharyngeal itching, dry pharynx, and a cough that is even worse at night, triggered or aggravated by cold air, dusty environments, irritating gases, exercise, smoke, etc. The cough can last for more than 3 weeks or even longer. X-ray chest examinations are usually unremarkable. The cough belongs to the category of “prolonged cough” and “persistent cough” in Chinese medicine, and despite repeated application of anti-infective, cough suppressant and phlegm-relieving western drugs, the effect is minimal. The evidence belongs to wind-heat and dryness that love the lung, and the lung is not clear and moist. The treatment starts from clearing and moistening the lung, and relieving phlegm. The medicine is based on the use of Saxifrage, Mulberry leaf, Almond, Medlar, Radix Platycodon, Rhizoma, Radix eucommiae, Radix clam shell, Loquat leaf, Radix Bupleurum, Agaricus, Chuanbei mother, etc. If the cough is prolonged without sputum and the throat is itchy, add Sclerocarya sinensis, roasted whole scorpion, and Ume plum; if the sputum is not easy to be coughing out, add Chuanbei mu with, Zhi Mu, Silphium, etc. If the cough is continuous and violent and causes syncope, there is a transient loss of consciousness, called cough syncope syndrome, it is advisable to strengthen the dispelling of wind and cough, available centipede, etc., and pay attention to personal protection when fainting and falling to prevent accidental injury. If the cough leads to pain in the joints, this is a “liver cough”, so add Qing Pi, Citrus aurantium and Xiang Shen to dredge the liver and harmonize the luo; if the cough leads to drowning, this is a “bladder cough”, so add Qiang Wu as appropriate. If the initial stage of cough is wounded by wind and cold, with a heavy cough and headache, use Golden Boiling Herb San (Radix et Rhizoma Polygonati, Qian Hu, Hesperidin, Thornbush, Red Poria, Radix et Rhizoma Sempervirens, Roasted Licorice). For wind evil offending the lung, combining San Wou Tang with Stop Coughing San with addition and reduction (Ephedra, Almond, Radix Platycodon, Sempervis, Qian Hu, Orange Peel, Licorice) is recommended. As spring is full of rising Qi, coughs in spring can be treated with products that moisten the lungs and suppress the liver, such as Mai Men Dong, Bai Shao, Chuan Xiong, Baicalin and Zhi Mu. Where a cough occurs in spring, it is a disease of the spleen, so strengthening the spleen is the mainstay. If the cough is prolonged, add Aster and Bupleurum to warm the lungs and lower the rebellion, avoiding too warm, dry and pungent to hurt the lungs; if the surface cold is not resolved and there is heat in the lungs, heat is suppressed by cold, the cough is mute, the breath is urgent and asthmatic, the phlegm is thick, the mouth is thirsty, the heart is troubled, or there is body heat, add gypsum, mulberry peel and scutellaria to relieve the surface and clear the lungs. In spring, when the lesser yang is active and liver wood is strong, spleen and earth are easily suppressed. Chinese medicine attaches importance to suppressing wood and cultivating earth, and treatment should follow the principle of “on the time of the month, it is appropriate to raise Yang to nourish the spleen and stomach, and diarrhea the wind and wood”, and commonly use drugs such as Si Jun, Si Wu, Fang Feng, Qiang Wu, Scutellaria, Qing Pi and Paeonia. In the spring, the external sensation, because of more rising and floating Qi, the treatment of Xuan and descending, such as Zelig, Qian Hu, Hai Shi, the genus Gua Pou is also. If the patient is hyperactive in liver yang, the liver heat is burning inside, due to the lack of yin, the external evil is triggered by the stimulation of wind and yang, and the liver fire is vigorous, the wood fire interferes with the gold and the cough develops, mainly dry cough with little sputum, which can be accompanied by dysthymia, irritability, headache and dizziness, and redness of the eyes, etc. The treatment is to add and reduce Di Clam San and Di Bai San, and can add Hooked Vine, Tribulus terrestris, Chrysanthemum and White Peony. If the patient is suffering from Yang deficiency, cold drinks, deficiency cold in the lung, coughing white sputum with foam, sweet mouth, salivation, clear water coming out of the mouth, noisy or distended pain in the stomach and epigastrium, little appetite, sunken and thin pulse. The evidence belongs to drink stopping the lung and stomach, the treatment starts from warming the Yang to dissolve the drink, and Han Xia Wen Lung Tang (Han Xia, Fu Ling, Hsio Xin, Gan Jiang, Gui Xin, Radix Platycodon, Chen Pi, Fu Hua, Dang Shen, Atractylodes Macrocephala, Licorice) with addition and subtraction. If the patient is deficient in endowment, the lung is deficient in spleen qi, the surface of the body is not consolidated, and the cough is caused by the failure of propagation and purification. The clinical manifestations are easy to catch a cold, fatigue, poor appetite, loose stools, cough with low breath, thin white sputum, and weak pulse. For treatment, Si Jun Zi Tang combined with Yu Ping Feng San should be added and reduced. If the superficial evidence is obviously accompanied by nasal congestion, runny nose and sneezing, add Jing Fang and Qiang Wu as appropriate to relieve the wind and take care of the symptoms. If the cough is caused by staying up all night, overworking or weakness, the deficiency of positive qi can not protect the evil, and there are many people with prolonged cough due to deficiency, so the treatment of cough should not neglect to support positive qi, especially to benefit qi and strengthen the spleen. In clinical evidence, it is optional to add Radix et Rhizoma Ginseng, Radix Astragali, Rhizoma Atractylodis Macrocephalae, Poria, etc. to strengthen the spleen and benefit Qi. Spring is the season of transition from cold to warm, the climate is extremely unstable, sometimes cold and sometimes hot, the body begins to drain, the ability to protect against cold is weakened. Therefore, the human body is susceptible to wind and cold, especially the elderly and frail, more susceptible to cold, and even induce a variety of diseases, folk widely circulated “spring cover autumn freezing” valuable experience, cautioning people to pay attention to warmth in spring, do not prematurely reduce clothing, nor hot immediately undress, so as not to catch a cold, prevention of colds is an important aspect of spring health Prevention of cold is an important aspect of spring health. Spring is coming, the climate is getting warmer, the breeze is blowing, various germs are starting to sprout, and spring is the season of high incidence of infectious diseases. Therefore, spring health care should prevent the prevalence of infectious diseases, and prevent the transmission of influenza. For this reason, it is important to be hygienic and to strengthen physical exercise to improve the body’s ability to resist disease. Cough patients should not smoke or drink. This is because tobacco and alcohol are pungent and warm, and in addition to having a direct stimulating effect on the pharynx, they also tend to produce phlegm from fire and aggravate the condition. In addition, it is not advisable to eat spicy and irritating food, greasy and fishy food and too sweet and salty food, such as seafood, fish, shrimp, golden needle, bamboo shoots, pickles, mutton, leeks, dog meat, rooster meat, garlic, dried lychee, cinnamon meat, chocolate, peanuts, pepper, pepper, garlic and other foods. It is advisable to eat a light diet and foods that help to dissolve phlegm and stop cough, such as fresh vegetables, soybeans and soy products, white radish, cabbage, spinach, etc.; or eat foods that nourish Yin and moisten the lungs, such as pear, loquat, water chestnut, lily of the valley, walnut kernel, honey, etc. ”For those who have a cold wind-cold sensation, cold foods such as persimmon, melon, eggplant, spinach and crab should be forbidden during medication. The early stage of cough should not be used early to collect astringency, and the above-mentioned diet should be avoided when sour and astringent products such as pomegranate, umeboshi and olives are used.