Asthma can begin at any age, but it usually starts in childhood.

The National Heart, Lung, and Blood Institute says risk factors for developing asthma include:

• Having frequent respiratory infections and wheezing.
• Having a parent with asthma.
• Having allergies.
• Having eczema.
• Being a boy or an adult woman.
• Working in an environment with dust and chemicals.

Source: HealthDay