Asthma can affect men and women of any age. It is an inflammatory disease of the respiratory tract. Not contagious or contagious. Inflammation causes increased sensitivity of the airways. Symptoms may include frequent coughing , shortness of breath , chest pain , noise , chest tightness, or difficulty breathing. If not treated properly , the disease can often lead to death. The exact cause of asthma is not yet known. Nothing alone can be blamed for this disease. Studies have shown that some people may have hereditary or environmental factors. Asthma can be caused if a close relative is infected or if someone is allergic to various products. In addition, if the airways are overly sensitive , this disease can occur. In addition to the small insects called mites in the dust , from the pollen of flowers ; Animal feathers , fungi , malt , yeast , those who are directly or indirectly exposed to cigarette smoke can get the disease. Direct or indirect cigarette smoke is not only a cause of shortness of breath , but in many cases exacerbates asthma. Reduces the effectiveness of asthma medications , sometimes even reducing the long-term effectiveness of the lungs. Sometimes the disease can be due to professional reasons. Certain irritants or trigger factors can often cause respiratory distress in a sensitive patient - such as respiratory infections , exposure to allergens , air pollution , and cigarette smoke. Some drugs , such as beta blockers , which are used to control high blood pressure , NSAIDs (painkillers) aspirin can cause asthma in some cases. In addition, stress can increase the severity of asthma. Some people are sensitive to certain foods or eat shrimp , duck eggs , beef , eggplant , spinach , sweet pumpkin , hilsa fish etc. However, very few people have allergies or shortness of breath due to food allergies. Some people may have difficulty breathing due to the smell of different scents , mosquito coils or some pesticides.