COPD (chronic obstructive pulmonary disease) is a group of lung diseases that cause breathing difficulties. COPD is caused by swelling of the airways that carry air in and out of the lungs. Triohale Inhaler relaxes the muscles of these airways and widens it. This makes you breathe easy and gives relief from symptoms such as tightness in your chest, shortness of breath, wheezing and coughing. Avoid smoking and minimise your exposure to pollution, dust and fumes. Along with that, a little exercise each day can help you stay strong. Talk to your doctor about how much exercise is good for you.