Coughing up blood and possible disease

A cough can bring up blood when inflamed airway surfaces become fragile. Acute bronchitis and some respiratory infections may do this, while bronchiectasis can cause repeated mucus and blood because airways are widened and prone to irritation. Asthma, allergic rhinitis and acid reflux may keep a cough going, sometimes causing small streaks after repeated coughing. Bronchiolitis is mainly an illness of young children and can cause troublesome breathing symptoms.

These conditions have overlapping symptoms, so the word disease does not identify one cause. A clinician may ask about duration, fever, wheeze, breathlessness, chest pain, smoking, recent illness and medicines before deciding what examination or testing is appropriate.

Arrange a prompt appointment if blood appears again, your cough is persistent, or you have a known lung condition. Until reviewed, avoid smoking and vaping, keep fluids nearby, and do not self-start antibiotics or stop prescribed medicines. Note the appearance of the blood, the amount, associated mucus, and any trigger such as vigorous coughing or a nosebleed. Take your medicine list to the appointment.

Call emergency services for difficult breathing, chest pain, fainting, confusion, blue lips, severe weakness, or bleeding that is ongoing or increasing. Seek same-day medical advice for repeated blood, fever with worsening illness, or a new change in a long-standing cough. A calm appearance does not rule out a problem, so use the symptoms and their progression to guide urgency.

Ask which causes fit your pattern, whether the blood could come from the nose or throat, and what examination is needed. Also ask how to manage your cough safely, which symptoms should trigger emergency help, and whether an existing asthma, reflux or airway problem changes the plan.