Pulmonary fibrosis is an interstitial lung disease that causes lung scarring which affects a person’s ability to breathe. The tissue deep in the lungs becomes thick, stiff, and scarred which causes breathing problems. There is no known cause of pulmonary fibrosis which is why such cases are called idiopathic pulmonary fibrosis. This disease can develop slowly or quickly and can stay for prolonged periods. The main problem with pulmonary fibrosis is the ability to breathe normally gets affected. The thins lacy walls of the air sacs in the lungs are responsible for adsorbing oxygen into the blood stream; they lose the ability to do this process effectively when scarred. This causes breathing problems and other discomforts in the lungs, with the stiffness and fibrosis making it very difficult to expand the lungs and breathe. More energy is required to breathe normally which causes discomfort and leads to shortness of breath to do activates which were otherwise easy to do. The causes which are known for pulmonary fibrosis include exposure to toxins like asbestos, coal dust, and silica which are commonly faced by workers who are working in the coal mining or sandblasting industry. Collagen is the most abundant protein in the human body which is found in the bones, skin, and tendon.