Pneumonia occurs as a complication on the background of diseases of the upper respiratory tract. Laryngitis, pharyngitis, sore throat, etc, especially in General weakness of the patient's body and a low immune system, lead to bronchitis – inflammation of bronchi. If the bronchitis could not quickly and effectively treated, the infection spreads even further and captures the lung tissue. And so begins the pneumonia. This is the main variant of its occurrence.

Pneumonia may occur as a response of the organism to heavy inflammation, poisoning, violation of the integrity of bone tissue, surgery, etc. Why is this happening? The fact that the lungs, along with vital function – breathing, act as a filter, cleaning the air and blood from various toxins. This cleaning comes with external parties (inhaled air) and internal (neutralization of harmful substances produced by the body). If the body suddenly sharply increase the level of these toxins, the lungs can simply not cope with its role as a filter, just as it will not cope with its role of a barrier dam if the water level in the reservoir will suddenly increase.

Any large inflammatory process, severe burns, surgery (especially heavy), trauma - all this leads to the fact that the organism generated a huge amount of toxins. Their level can exceed critical, then the pneumonia.

The impetus for the development of pneumonia, may also serve as excessive dryness of the air, its dust, or use when wet cleaning and disinfection of chlorine-containing agents (chlorine, chloramine). Despite their effectiveness the pungent smell of chlorine can cause disease of the upper respiratory tract, which quickly spread inland.