What is the incentive for an asthma attack

The incidence of asthma and recurrent there are many complicated factors, mostly in the genetic basis of in vitro and in vivo by some of the factors stimulating. The main factors stimulating as follows:

A. allergens
First, specific antigen:
Pollen: who inhaled asthma caused by pollen, known as pollen asthma in certain areas and certain seasons due to inhalation of pollen allergens, caused by seasonal attack or a seasonal increase in bronchial asthma.
Dust: all kinds of dust can often inspire or aggravating asthma attack, inorganic dust as the dust on the street often is a provocative material. Organic dust can be irritating may also be caused by immune-mediated reaction.
Dust mites: breeding ground for dust mites in the human living environment, such as bedrooms, mattresses, pillows, sofas, clothing, etc. many, the school floor, Cotton Mill, flour mills, food warehouses, etc. also Yousheng mites. Mite allergy incidence of children than adults, men than women.
Second, the original skin sensitization:
For dogs, cats, the horse dander caused by Type I allergic disease, is well known. The dog, cat fur is not important allergen, their dander is an important allergen.
Excreta of insects: beetles, locusts, borers, bean in the trunk insects, Valley mites, cockroach droppings can cause allergic type I result of an asthma attack.
Third, non-specific factors: industrial gases, ammonia, gas, oxygen, methane, cold air, such as sulfuric acid can be induced asthma.

B. respiratory tract infection
Respiratory infections and asthma have an important relationship. Many patients with asthma in the upper respiratory tract infection after wheezing intensified, children become more evident. Early epidemiological survey showed that viral respiratory tract infections will increase asthma. Stimulate their asthma is the mechanism of multiple factors, the existing data show that viral respiratory infection seems to have increased airway anti-inflammatory effect of potential, this factor and the incidence of asthma is very similar mechanism.

C. climatic factors
Low: the sudden temperature change may be a stimulus, as the general asthma inhalation of gas or other irritating gas, like asthma attack immediately. Some people think that, climate and environmental changes in the human body is a kind of "stress", such stress can affect the body's nervous system, endocrine, acidity in body fluids, potassium and calcium balance immune mechanisms.
Humidity: high humidity can affect the surface water evaporation, the body to speed up to compensate for breathing, which is harmful to asthma. Then check lung function can be observed that the airway resistance increased humidity is too low on the other hand, can cause respiratory mucosa dry and asthma attack. Because of exercise-induced asthma symptoms and dry airway clear. Is generally believed that the ideal humidity should be 35 percent to 50 percent. So far it is difficult to clarify humidity on the mechanism of stimulating asthma is generally believed that bacteria and mold in damp growth and reproduction in the air easily and thus easily lead to respiratory tract infection and induced asthma.
Pressure: low air pressure at various allergens such as pollen, mold, bacteria, dust and industrial stimulus, such as Piaosan or not fly, so easy to be inhaled.
Ion air: Some experts believe that cause allergic symptoms is not due to temperature, humidity and air pressure and other changes, which may be due to air in the presence of plasma.

D. drug factors
The cause of asthma drugs is not uncommon, clinical tincture of commonly used drugs such as the Huatanzhike syrup, sulfonamides, aspirin, penicillin, propranolol, local anesthetic agents, it must be asked about the treatment of patients with drug allergy History.

E. mental element
Known to stimulate the spirit and that can be induced therapy and treatment of asthma.

F. sports factors
The exercise-induced asthma also known as exercise-induced asthma that after a certain amount of the movement, the size of a temporary airway obstruction. In general, patients with acute asthma attack or acute history of the near future, the use of appropriate stimulation and more sensitive lung function measured in proximity to the greatest amount of exercise, can be induced by exercise-induced asthma.