The smoke emitted when smoking can emit over 4,000 gases and particles, most of which are very strong irritants. These particles can remain in the air for hours after you stop smoking and can be inhaled, causing even more harm to your health. Passive smoking can trigger asthma and increase the severity of asthma attacks. How can we avoid the effects of passive smoking in our daily lives? Parents and caregivers of children with asthma should not smoke or smoke at home or in the child’s room, let alone in front of the child; 2. If someone at home smokes, open the windows and doors to allow air circulation, but air circulation alone is not enough to avoid exposure to passive smoking; 3. of tobacco residue to avoid the hazards of third-hand smoke to children.