Persistent post-COVID breathlessness — what we know in 2026

Years after a COVID-19 infection, a meaningful number of adults still notice breathlessness climbing stairs, a chest tightness with exertion, or a cough that keeps coming back. In 2026 we understand this much better than we did in 2021.

The four common patterns we see

• Persistent small-airway inflammation — picked up on FOT or HRCT
• Post-COVID interstitial change (fibrotic streaks on HRCT)
• Dysfunctional breathing — a learned shallow-breathing pattern
• Deconditioning — the lungs are fine but the body has lost fitness

What an evaluation looks like

We start with a structured history and a 6-minute walk test with oximetry. Most patients then need a PFT with DLCO, an HRCT chest, and sometimes echocardiography to rule out post-COVID pulmonary hypertension.

What actually helps

• Targeted inhaler therapy when small-airway disease is documented
• Structured pulmonary rehabilitation — the single most effective intervention
• Breathing retraining for dysfunctional breathing
• Anti-fibrotics in carefully selected fibrotic cases

If you have been told 'your scan is normal' but you still cannot do what you used to, you have not been fully evaluated. A pulmonology review is worth it.