Obesity and asthma: understanding the link

Extra tissue around the chest and abdomen can make the lungs work harder, especially during activity or when lying down. Obesity is also associated with inflammatory changes that may affect the airways. Breathlessness is not always asthma: reflux, poor sleep, reduced fitness, and obstructive sleep apnoea can produce similar complaints or add to asthma symptoms. A clinician may need to confirm the diagnosis with breathing tests and review whether symptoms vary with triggers.

Use your inhalers exactly as prescribed and check your technique with a clinician or pharmacist. Keep a record of wheeze, cough, night symptoms, exercise limits, and reliever use. Gentle activity, paced to your breathing, can support fitness; ask for a plan if movement brings symptoms. Work with a healthcare professional on nutrition, sleep, and realistic weight-management goals rather than making sudden restrictive changes. Treating reflux or sleep apnoea when present may also improve breathing comfort.

Follow your asthma action plan for worsening wheeze, cough, chest tightness, or breathlessness. Seek emergency help if you cannot speak comfortably, your lips look blue or grey, breathing is rapidly worsening, you feel faint or confused, or your reliever is not helping as expected. New breathlessness should be assessed because it may have causes other than asthma.

Ask whether your breathing symptoms are confirmed as asthma, how obesity or sleep quality may be contributing, and whether your inhaler technique is effective. Request a written action plan and guidance on safe activity.