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.
By Mayo Clinic Staff. Coughing up blood can be caused by a variety of lung conditions. Coughing up blood can take different forms: The blood may be bright red or pink and frothy, or it may be mixed with mucus. Also known as hemoptysis (he-MOP-tih-sis), coughing up blood, even in small amounts, can be alarming. However, producing a little blood-tinged sputum isn't uncommon and usually isn't serious.
Excess mucus in the stool is sometimes accompanied by other symptoms, which may be a sign of a bigger problem. These symptoms include: blood or pus in the stool. abdominal pain, cramping, or bloating. changes in bowel movements or habits.