Your body can heal so hard it strangles your organs
When the biological machinery for repair loses its off-switch, it replaces your soft, breathable lung tissue with rigid collagen structures that function like internal leather.
A healthy human lung is a masterpiece of surface area, containing roughly 70 square meters of delicate membrane—about the size of a small apartment—packed into your chest. This vast expanse allows oxygen to slip into your blood across barriers thinner than a strand of silk. However, in a condition called idiopathic pulmonary fibrosis, the body begins a relentless campaign of over-healing. Instead of simply patching a wound, the immune system triggers a cascade of collagen production that turns these paper-thin walls into thick, inflexible scars. As the tissue stiffens, the lungs lose their ability to expand, effectively turning a soft sponge into a rigid block of leather.