Explicating an anti-inflammatory, decongestant, mucolytic and trophic action on the mucosa, they are indicated to prevent relapses. The inhalation therapies, by means of special equipment and thanks to the mixing of thermal water with air vapors, allow to obtain micro particles of various diameters and to make the active principles of thermal water reach the mucosa of the upper and lower respiratory tracts. In inhalation, the particles reach a size of about 100 microns and, through a jet, they reach the first airways; in the aerosol reach a size of 1-2 microns and through mask or fork reach the upper and deep airways into the pulmonary alveoli. The micronized shower completes the picture of inhalation therapies and it is indicated in all those pathologies of the very first airways rhinopharyngitis chronic sinusitis, characterized by the presence of abundant catarrhal mucus purulent secretions. It cleanses the nasal cavities and surrounding areas. A medical examination is necessary.