Asthma - Symptoms and causes - Mayo Clinic
Mar 8, 2025 · Asthma is a condition in which your airways narrow and swell and may produce extra mucus. This can make breathing …
Asthma: Types, Causes, Symptoms, Diagnosis & Treatment
Jun 18, 2025 · Asthma is a condition that causes long-term (chronic) inflammation in your airways. The inflammation makes them …
Asthma - Wikipedia
Asthma is a common long-term inflammatory disease of the airways. It is characterized by variable and recurring symptoms and …
Asthma - World Health Organization (WHO)
Apr 28, 2026 · Asthma is a major noncommunicable disease (NCD), affecting both children and adults, and is the most common …
Asthma | Asthma | CDC
Main page linking asthma control, surveillance, and program information
What Is Asthma? Symptoms, Causes, and Treatments - WebMD
Mar 20, 2026 · Asthma, a persistent respiratory condition, narrows airways, causing breathlessness and difficulty breathing. Explore …
Asthma - What Is Asthma? | NHLBI, NIH
Apr 17, 2024 · Asthma is a chronic condition that inflames and narrows the airways in the lungs. Learn about asthma symptoms, …
What Is Asthma? - American Lung Association
Jan 20, 2026 · Asthma is a lung disease that makes it harder to move air in and out of your lungs. Asthma is chronic, so you live with …
About Asthma | Asthma | CDC
Jan 22, 2024 · About Asthma Key points Asthma is a disease that affects your lungs. It is one of the most common long-term …
Asthma - American Lung Association
Asthma support and education resources from the American Lung Association.