Secondhand smoke not only tends to damage the respiratory system of children but also may cause secretory otitis media. If you are exposed to secondhand smoke for a long time, a large amount of nicotine contained in the smoke can enter the lungs with breathing and affect the respiratory system, while flowing to various parts of the body through blood exchange, causing secretory otitis media. And, long-term exposure to secondhand smoke, but also easy to affect the heart function. Secondhand smoke is the smoke released from the burning end of tobacco products, also known as passive smoking, tobacco burning will release tar, nitrogen, nicotine and other harmful chemicals, including carcinogens, long-term inhalation of secondhand smoke will also cause some damage to the body. Because it enters the body mainly through breathing, the damage to the respiratory system is greater, and children can cough and cough up sputum and other symptoms. At the same time, when nicotine enters the bloodstream, it causes small blood vessels to spasm, leading to sclerosis of the micro-arteries that supply blood to the inner ear, resulting in insufficient blood supply to the inner ear, causing dilatation of the mucous membrane veins in the middle ear, bruising, increased permeability of the blood vessel walls, and leakage of fluid from the tympanic chamber, which can easily lead to secretory otitis media with long-term accumulation, and children can experience hearing loss, ear pain, tinnitus, and stuffy ears. In addition, due to the surrounding population smoking, exposure to secondhand smoke during childhood will detect nicotine metabolites in their blood specimens, and the harmful components in the body can cause changes in blood flow, blood vessels, blood pressure and heart rate, which in turn can cause arterial vascular damage affecting heart function. Secondhand smoke is more harmful, in addition to causing some harm to children, adults smoking secondhand smoke for a long time, may also affect the cardiovascular system, increasing the incidence of coronary heart disease, hypertension and other diseases, as well as infertility, infertility and other reproductive system diseases. At the same time, smoking has a greater impact on their own, so it is recommended to quit smoking as soon as possible, for their own health and the health of their families are beneficial.