Asthma

![Disability-adjusted life year for asthma per 100,000 inhabitants in 2004.[168]
no data
<100
100–150
150–200
200–250
250–300
300–350
350–400
400–450
450–500
500–550
550–600
>600](/uploads/202501/11/Asthma_world_map_-_DALY_-_WHO2004.svg5837.png)
Asthma is a common long term inflammatory disease of the airways of the lungs. It is characterized by variable and recurring symptoms, reversible airflow obstruction, and bronchospasm. Symptoms include episodes of wheezing, coughing, chest tightness, and shortness of breath. These episodes may occur a few times a day or a few times per week. Depending on the person they may become worse at night or with exercise.