Health Conditions that Cause Mucus in Stool. A sudden onset of mucus in the stool, accompanied by urgent diarrhea, cramping, fever, and blood in the stool may be indicative of a bacterial infection. If you are having any of these symptoms, contact your physician immediately.
Atelectasis, or localized obstruction of the lungs that may result from mucus plug obstruction, can occur resulting to the collapse of a portion of the lungs. This is enumerated by the study published by Respiratory Care in September 2007.
Symptoms may include: 1  Cough, often producing mucus, also called sputum, from the lungs. 2  Mucus may be rusty or green or tinged with blood. 3  Fever, which may be less common in older adults. 4  Shaking, teeth-chattering chills. 5  Fast, often shallow, breathing and the feeling of being short of breath.hey may include: 1  Cough. 2  You will likely cough up mucus (sputum) from your lungs. 3  Mucus may be rusty or green or tinged with blood. 4  Fever. 5  Fast breathing and feeling short of breath. 6  Shaking and teeth-chattering chills. 7  Chest pain that often feels worse when you cough or breathe in. 8  Fast heartbeat.