Oxygen for shortness of breath: what to know

Breathlessness can arise from airway narrowing, infection, anaemia, heart problems, anxiety or other conditions. Oxygen is a treatment for inadequate oxygen in the blood; it is not a general breathlessness reliever. A person can feel short of breath while oxygen is normal, and oxygen can be low without a dramatic sensation. A clinician may check your breathing, pulse and oxygen level, then consider the underlying cause.

Examples that may need different treatment include asthma, COPD, acute bronchitis, angina or anaphylaxis. Seek care based on the severity and pattern of symptoms, not on an assumption about the diagnosis.

Sit upright, loosen restrictive clothing and try to stay still while arranging medical advice. Use prescribed inhalers or oxygen only as directed; changing the flow or borrowing someone else’s equipment can be unsafe. Keep away from smoke and note when the breathlessness began, what triggers it, whether it occurs at rest, and any chest discomfort, fever, wheeze or blue colouring. A clinician can decide whether you need oxygen, tests or another treatment.

Call emergency services for severe or rapidly worsening breathlessness, inability to speak in full sentences, blue or grey lips, fainting, confusion, sudden chest pain, or swelling of the face, tongue or throat. Do not delay for a home oxygen reading. New breathlessness, breathlessness at rest, or symptoms after a possible allergic reaction also need prompt assessment.

Ask what may be causing the breathlessness, whether your oxygen level was low, how it was measured, and whether oxygen is needed during activity or sleep. Clarify the prescribed flow, duration and safety instructions, and ask which symptoms should prompt an urgent review.