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Asthma is a particularly troublesome condition. Its main symptom is a tightening of the airways. People having an asthma attack can find it very difficult to breath. Drugs and vaccines are often used to treat the symptoms of asthma.
Asthma can be both allergic and non-allergic. Allergens that commonly trigger attacks are animal dander, pollens, mold, chemicals, drugs, dust mites, food additives, seafood, dairy products, and tobacco smoke. Non-allergic causes of asthma include adrenalin disorders, temperature changes, exercise, extreme dryness or humidity, fear, low blood sugar, and stress.