SHS 12Asthma

Asthma is a condition in which your airways narrow and swell and produce extra mucus. This can make breathing difficult and trigger coughing, wheezing and shortness of breath. Asthma can't be cured, but its symptoms can be controlled. Because asthma often changes over time. Asthma is a long-term disease of the lungs. You might hear your doctor call it a chronic respiratory disease. Severe asthma attacks can be life-threatening. Cause of asthma  Genetics. If a parent has asthma, you’re more likely to develop it.  History of viral infections. People with a history of viral infections during childhood are more likely to develop the condition.  Hygiene hypothesis. This hypothesis proposes that babies aren’t exposed to enough bacteria in their early months and years. Therefore, their immune systems don’t become strong enough to fight off asthma and other conditions.  Early allergen exposure. Frequent contact with possible allergens and irritants may increase your risk for developing asthma. Asthma triggers  Illness. Respiratory illnesses such as the flu and pneumonia can trigger asthma attacks.  Exercise. Increased movement may make breathing more difficult.  Irritants in the air. People with asthma may be sensitive to irritants such as chemical fumes, strong odors, and smoke.  Allergens. Animal dander, dust mites, and pollen are just a few examples of allergens that can trigger symptoms.  Extreme weather conditions. Conditions such as very high humidity or low temperatures may trigger asthma.  Emotions. Shouting, laughing, and crying may trigger an attack.