In many areas, pollens can be a problem from February through November each year. Remove fallen leaves and avoid cutting the grass. If you must use a humidifier, clean it daily with a bleach and water solution. Reduce indoor humidity to less than 50 percent - use a dehumidifier, if needed. Empty and clean the dehumidifier daily.
Some people are very allergic to the substance the cockroach leaves behind.
Cockroaches are very common in warm climates and in homes of people living in the city. However, even in climates with much cooler temperatures, the use of central heat allows the cockroaches to live. Exercise is good for your health and lungs. Some forms of exercise such as running long distances and playing basketball may be harder for you to do. Activities such as swimming, golf, and karate are good choices for persons with asthma.