Factors that contribute to the early signs of lung disease include smoking, radon, air pollution and asbestos, according to the Office on Women's Health. Smoke from cigars, cigarettes and pipes is the leading cause of lung disease, and secondhand smoke can contribute to the condition.
The early signs of lung disease are not easy to see, and one of the first signs is having low energy, explains the Office on Women's Health. Other common signs of lung disease include shortness of breath, inability to exercise, a chronic cough, pain or discomfort when breathing, and coughing up mucus or blood. There are a number of conditions that fall under the lung disease category, including asthma, chronic obstructive pulmonary disease and lung cancer.
Radon testing is an important part of lowering the risk of developing lung disease, states the Office on Women's Health. Radon testing kits are available from most hardware stores. It is also important to avoid exposure to asbestos. In addition, inhalation of chemical fumes and dust may contribute to the formation of lung disease, so protective gear is vital for those who work in conditions where these are present. A healthy diet lowers the risk of lung disease as well, but this cannot undo damage to the lungs that is already present.