Symptoms of cystic fibrosis depend on the area affected. If you have CF the thick mucus is difficult to cough up and provides an ideal environment for bacterial growth leading to chest infections. Over time, repeated infections can damage the lungs and you may become more breathless and prone to further chest infections. Treatment with antibiotics can help treat your chest infections and prevent damage to the lungs. In the digestive system if you have CF enzymes produced by your pancreas can't reach your gut because the flow is blocked. Without these enzymes you may not get enough nutrients particularly, fat and you may find it difficult to gain weight. Your faeces may contain excess fat making it oily, smelly and difficult to flush away.
Attribution: BUPA