Health LibrarySymptomsShortness of Breath: Causes and When to Act
Symptoms

Shortness of Breath: Causes and When to Act

Any new or worsening breathlessness deserves attention.

Medically reviewed
Updated 2026

Common causes

Asthma, pneumonia, heart failure, anemia and anxiety are common causes.

Emergency signs

Breathlessness at rest, blue lips, confusion, or inability to speak in full sentences is an emergency.

Concerned about your symptoms?

Start a free AI-led clinical interview on Milli. Every diagnosis is verified by a licensed Indian doctor.

Educational content only

Milli's Health Library provides general educational information reviewed against peer-reviewed medical sources. It is not a diagnosis, prescription, or medical advice. Milli does not recommend medications. Always consult a licensed doctor before starting, stopping or changing any treatment.

Have a symptom on your mind? Ask Milli.

Get an instant, evidence-based clinical interview — verified by licensed doctors.