A risk factor is something that raises the chances of getting a health problem. A person can get asthma with or without the ones listed below. The chances of getting asthma are greater in people who have many.

Things that can raise the risk are:

Genetics

People who have family members with asthma may be more likely to get it themselves.

Allergies

People who have allergies have a greater chance of getting asthma. Allergens that are often linked to asthma are:

• Pollen
• Animal dander
• Mites
• Molds
• Dust and dust mites
• Some foods

Health Problems

Having these health problems raises the risk:

• Allergic rhinitis
• Respiratory infections in childhood, especially bronchiolitis
• Premature delivery
• Obesity

Jobs

People who have jobs in farming, painting, and cleaning are more likely to get asthma.

Smoking

Smoking, smoking when pregnant, and being around secondhand smoke raises the risk of asthma.

Medicine

Aspirin and nonsteroidal anti-inflammatory drugs can raise the risk of asthma in some people who also have rhinitis and sinusitis. This is called aspirin-induced asthma