| 1 | Be there any blood or mucus in your stool? | |
| 2 | It also excretes mucus, which protects the lining from the acid. | |
| 3 | This mucus often changes from white to green or yellow. | |
| 4 | Tubes inside the lung become chronically inflamed, producing excess mucus. | |
| 5 | I experience a lot of mucus in my throat during the day. |