Wet rales are produced in the lungs mainly because of the presence of fluid in the lungs, due to the sound produced by the rupture of gas during inhalation through the secretions in the respiratory tract, such as inflammatory exudate or pus or sputum, thin sputum, blood, mucus, or pus-forming blisters. Wet rales are also produced when the walls of the small airways become occluded due to adhesion of secretions and suddenly open during inspiration. Wet rales are a continuous and short-lived addition to respiratory sounds, usually occurring in a series of several, less variable in nature, and may be present along with small blistering sounds. They may be reduced or disappear after coughing and are mainly seen in chronic bronchitis, acute bronchitis, bronchiectasis, or other inflammatory diseases of the lungs, as well as in pulmonary edema and pulmonary stasis.