Pneumothorax is a condition in which air accumulates in the areas of the pleura between the lungs and the chest wall. It is basically a condition in which the lungs collapse due to leaking air pushing from the chest walls to the outside of the lungs.
In most cases, only one lung is affected, rare cases of this lung disease where both lungs refused at the same time.
Pneumothoraxes are classified as Spontaneous and Traumatic.
-  Spontaneous pneumothoraxes are further divided into primary and secondary types. Each specific kind is associated with different causative factors.

• Primary Spontaneous Pneumothorax -  The exact cause of this type is unknown, but people who smoke a lot or have a family history of pneumothorax, are more likely to acquire this lung disorder

• Secondary Spontaneous Pneumothorax -  People with COPD ,  pneumonia and tuberculosis are more predisposed to contracting this kind of pneumothorax.

-Traumatic Pneumothorax-  this type is caused due to a sudden trauma or serious injury to the chest wall. The problem is most aggravated when the region affected is the ribs, resulting in fractures.