Heart failure and shortness of breath

Breathlessness may appear during walking, climbing stairs, or other activity because the body needs more blood flow. As heart failure becomes less controlled, breathing can also feel difficult while resting or lying flat. Some people wake suddenly at night feeling unable to catch their breath. A cough, tiredness, or swelling around the ankles may occur alongside it.

Shortness of breath has many possible causes, including asthma, COPD, acute bronchitis, anaemia, angina, atrial fibrillation, and severe allergic reactions. The symptom alone cannot identify the cause. A clinician may assess your heart and lungs, review medicines, and check for changes that suggest fluid retention or another problem.

Take heart-failure medicines exactly as prescribed, and do not stop or add a medicine without medical advice. Notice whether breathlessness is new, worsening, triggered by less activity, or present when you lie down. Keep a record of symptoms and any daily weight checks your care team has recommended. Pace activity, rest when needed, and follow your personalised advice about salt, fluids, and monitoring.

Arrange a clinical review if your usual breathing pattern has changed, even if the change is gradual. Bring an up-to-date medicine list and mention missed doses, a recent infection, chest discomfort, palpitations, or ankle swelling.

Call emergency services now for severe or rapidly worsening breathlessness, breathing difficulty at rest, blue or grey lips, fainting, confusion, or chest pressure or pain. Sit upright while waiting and avoid driving yourself. Seek same-day medical advice if you need extra pillows to breathe, wake repeatedly gasping, or notice a clear deterioration from your usual symptoms. These changes can reflect worsening congestion or another urgent heart or lung problem.

Ask what level of breathlessness should prompt a call, whether you should monitor weight or fluid intake, and how to respond if symptoms increase. You can also ask whether your medicines, heart rhythm, lung health, or anaemia could be contributing, and when your next review is needed.