My friend is having allergic skin lesion and Asthma

Look for Prevention:

Allergic asthma affects about 3 million children (8 to 12 percent of all children) and 7 million adults in the United States at a cost estimated at $6.2 billion a year. Asthma episodes, or attacks - with tightness in the chest and difficult breathing - often can be managed with drugs delivered by small pumps that patients carry, but they sometimes strike with life-threatening severity requiring emergency hospital treatment to forestall death.
reducing dust mite and cockroach allergen levels in homes can prevent sensitization to these allergens and thus prevent asthma from developing.
cover mattresses, steam carpets, trap roaches and apply tannic acid* to any suspect surface.