How common is coughing up phlegm in acute bronchitis?

Acute bronchitis involves irritation and inflammation of the breathing tubes. The airways can make more mucus while they recover, and coughing helps move that mucus out. Phlegm may be clear, white, yellow, green, or thicker than usual; its colour alone cannot show whether the cause is viral or bacterial. A cough can remain troublesome after other cold-like symptoms have improved because the airways may stay sensitive for a while.

Rest, drink fluids regularly, and avoid smoke, vaping, and other airway irritants. Warm drinks can soothe a scratchy throat, while sleeping with your head slightly raised may make nighttime coughing easier. A pharmacist can advise whether a pain reliever, throat remedy, or cough product suits you, including if you are pregnant, have long-term conditions, or take regular medicines. Antibiotics do not help every case, so a clinician decides when they are appropriate.

Seek urgent assessment for difficulty breathing, chest pain, coughing up blood, blue or grey lips, confusion, or marked drowsiness. Arrange a medical review if you have a high fever that persists, wheezing that is new or worsening, symptoms that are not settling, or a condition affecting the heart, lungs, or immune system. Young children, older adults, and people with severe underlying illness may need earlier assessment.

Ask whether your symptoms fit acute bronchitis, what signs could suggest pneumonia or another cause, and which treatments are suitable alongside your usual medicines. Ask when a follow-up review is needed if the cough or phlegm changes.