However, passing mucus in the stool, especially if it is a new symptom, should still be mentioned to a physician at the next office visit. Mucus without an underlying cause, such as one of the pre-existing conditions mentioned above, is a change in bowel habits and should be reported to a physician immediately.
Coughing up blood. Coughing up blood is the spitting up of blood or bloody mucus from the lungs and throat (respiratory tract). Hemoptysis is the medical term for coughing up blood from the respiratory tract. Considerations. Coughing up blood is not the same as bleeding from the mouth, throat, or gastrointestinal tract.
Coughing up blood can also be a sign of a serious medical condition. Call your doctor if you have any of these symptoms: 1  Blood in mucus that lasts longer than a week, is severe or getting worse, or comes and goes over time. 2  Chest pain.3  Weight loss.4  Soaking sweats at night.oughing up blood can also be a sign of a serious medical condition. Call your doctor if you have any of these symptoms: 1  Blood in mucus that lasts longer than a week, is severe or getting worse, or comes and goes over time. 2  Chest pain. 3  Weight loss. 4  Soaking sweats at night.