An asthma trigger is something that brings on asthma symptoms or makes them worse. Your doctor can help identify asthma triggers and suggest ways to avoid them or minimize their effects. About Dust Mites Dust mites are tiny bugs that can't be seen by the human eye. In fact, they are so small that six dust mites can fit on the end of a pin. Because dust mites hide in household dust, they can be found in every home.
Dust mites particularly like rugs, beds and pillows.
Wear a mask when vacuuming or when someone else is vacuuming. Wash curtains and woodwork often. Clean furniture and floors often with a damp cloth or mop, not a broom. Clean or change air filters every month. Wash bed sheets and blankets every week in hot water.