Cystic fibrosis is an inherited disorder that causes severe damage to the lungs and digestive system. Cystic fibrosis affects the cells that produce mucus, sweat and digestive juices. These secreted fluids are normally thin and slippery. But in people with cystic fibrosis, a defective gene causes the secretions to become thick and sticky. Take a look at allergies Singapore visit http://blog.drsundardas.com/category/allergies