Lung Health & Breathing

Persistent cough (over 3 weeks), coughing up blood, breathlessness with activities you used to do easily, wheezing, chronic mucus production, recurrent chest infections, unexplained weight loss, fatigue, and chest pain. Any of these deserve medical evaluation. In India, persistent cough always warrants ruling out tuberculosis.

Aerobic exercise (walking, jogging, cycling, swimming) improves overall cardiopulmonary fitness. Breathing exercises (pranayama, diaphragmatic breathing) improve efficiency and are especially helpful for people with COPD or asthma. Playing wind instruments strengthens respiratory muscles. Stopping smoking is the biggest lung-health intervention. Lung capacity itself doesn't grow beyond genetic potential, but function within your capacity improves.

Not routinely for healthy asymptomatic adults. Useful if you have persistent respiratory symptoms, occupational exposure, long smoking history, or being evaluated for asthma or COPD. Spirometry is quick, painless, and provides genuine diagnostic information. A screening spirometry every few years can be reasonable for higher-risk individuals.

Fine particulate matter (PM2.5) is small enough to penetrate deep into lung tissue and even enter the bloodstream. Long-term exposure causes airway inflammation, reduced lung development in children, worse asthma control, higher COPD and lung cancer rates, and increased cardiovascular disease. Children and outdoor workers are most exposed. Effects accumulate over years, so annual peaks in polluted cities matter.

Good HEPA-filter purifiers with adequate CADR (clean air delivery rate) for the room size do reduce indoor PM2.5. Measurable benefit for children, asthmatics, and elderly in high-pollution cities. Not a substitute for outdoor measures (masks, avoiding outdoor exercise on bad AQI days) or systemic pollution reduction. A cheap small unit in a large room does little; matching capacity to room size matters.