For example, severe asthma episodes tend to peak during the autumn months, especially among children.

Colds or other upper respiratory infections can cause asthma episodes in some people.

Secondhand smoke can trigger asthma episodes and increase the severity of attacks.

Symptoms of asthma may also vary from one asthma episode to the next.

A person who has frequent asthma episodes while being treated with inhaled steroids may need to have the medicine increased.

Some people can go a long time between asthma episodes while others have some symptoms every day.

Your symptoms may also vary from one asthma episode to the next.

Symptoms may be mild during one asthma episode and severe during another.

However, lung sounds are usually normal between asthma episodes.