1, wind-cold cough: manifested as thin and white cough, easy to cough up, shortness of breath and itching, accompanied by headache, nasal congestion, runny nose, fear of cold, slight fever, no sweat, limb pain, etc.
2, wind-heat cough: manifested as rough cough, hoarse voice, yellow and sticky cough, small amount, uncomfortable cough, sticky or yellow sputum, uncomfortable cough, often accompanied by fever, dry mouth, sore throat and so on.
/iknow-pic.cdn.bcebos.com/cdbf6c8 1800a 19d84359 1 1373efa828ba6 1e46ae"target="_blank"title=""class="ikqb_img_alink"> /iknow-pic.cdn.bcebos.com/cdbf6c8 1800a 19d84359 1 1373efa828ba6 1e46ae? x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_ 1%2Fquality%2Cq_85%2Fformat%2Cf_auto"esrc="/cdbf6c8 1800a 19d84359 1 1373efa828ba6 1e46ae"/>
Cough is a common symptom of respiratory tract, which is caused by inflammation, foreign body, physical or chemical stimulation of trachea, bronchial mucosa or pleura. It is characterized by glottis closing, respiratory muscle contraction and increased intrapulmonary pressure, then glottis opening, and air is ejected from the lungs, usually accompanied by sound. Cough has a protective effect on clearing foreign bodies and secretions in respiratory tract. However, if coughing keeps changing from acute to chronic, it often brings great pain to patients, such as chest tightness, itchy throat and panting.
The formation and recurrence of cough is often the result of the comprehensive action of many complex factors.
1. Inhalation
Inhalations can be divided into specific and non-specific types. The former such as dust mites, pollen, fungi, animal dander, etc. Nonspecific inhalants such as sulfuric acid, sulfur dioxide, chloramine, etc. Specific inhalants of occupational cough, such as toluene diisocyanate, phthalic anhydride, ethylenediamine, penicillin, protease, amylase, silk, animal dander or excrement, etc., in addition, non-specific ones include formaldehyde and formic acid.
2. Infection
The formation and attack of cough are related to repeated respiratory infections. In patients with cough, there may be specific IgE such as bacteria, viruses, mycoplasma, etc. If the corresponding antigen is inhaled, it can stimulate cough. After virus infection, it can directly damage the respiratory epithelium, resulting in increased respiratory responsiveness. Some scholars believe that interferon and IL- 1 produced by virus infection increase the histamine released by basophils. In infancy, after respiratory virus (especially respiratory syncytial virus) infection, there are many people who show cough symptoms. Cough caused by parasites such as ascaris lumbricoides and hookworm can be seen in areas with poor sanitary environment.
3. food
Cough attacks caused by diet are often seen in cough patients, especially infants who are easily allergic to food, but gradually decrease with age. The most common foods that cause allergies are fish, shrimps and crabs, eggs and milk.
4. Climate change
Cough can be induced when air temperature, temperature, air pressure and/or ions in the air change, so it is more common in cold season or climate change in autumn and winter.
5. Mental factors
Patients' emotional excitement, nervousness, resentment and anger will all lead to cough attacks, which are generally thought to be caused by cerebral cortex and vagus nerve reflex or hyperventilation.
Step 6 exercise
70% ~ 80% of cough patients induce cough after strenuous exercise, which is called exercise-induced cough or exercise-induced cough. Clinical manifestations include cough, chest tightness, shortness of breath, wheezing, auscultation and wheezing. Some patients have no typical asthma after exercise, but bronchospasm can be found by lung function test before and after exercise.
7. Cough and drugs
Some drugs can cause cough attacks, such as propranolol, which can block β2- adrenergic receptors and cause cough.
(Source:/baike.baidu.com/item/%E5% 92% B3% E5% 97% BD/791646? Fr = Aladdin "target =" _ blank "title =" Only one link can be selected to take effect "> Baidu encyclopedia: cough)