From the many children with lead poisoning seen in outpatient clinics, it is found that the source of lead that causes them lead poisoning is not only from industrial pollution (about 60%), but also 40% from domestic lead pollution, which is mainly closely related to living customs, and there are great geographical differences. Bad habit one: using tinware to serve food Representative regions: Wenzhou, Ningbo, Shaoxing, etc. The use of tinware is more common in Jiangsu and Zhejiang, such as using lead tin cans with good sealing performance to serve meat pine and snacks for children, or using tin pots to serve cold boiled water for children to drink directly or to give children milk to drink, or even using yellow wine (wine) left in tin pots to stir-fry vegetables for the whole family to eat after the rituals. The tin vessel will release a large amount of lead after holding food, water or wine, which will contaminate food and lead poisoning, especially the lead released by the tin pot holding wine, which leads to the most serious lead poisoning. In addition, in Shaoxing and Hangzhou, Zhejiang Province, there are also crafts or home workshops producing tin foil or stacking tin foil at home, which can easily lead to lead pollution, while many places have the habit of burning tin foil in ritual activities, which can also lead to serious lead pollution. Bad habit two: using lead powder to stop prickly heat Representative areas: Jiangxi, Fujian, Hunan, Hubei, etc. In a large area in the east centered on Jiangxi province, including Fujian, Hunan, Hubei, etc., there is the custom of using lead powder (red or yellow powder, which is actually lead oxide powder) as or mixed with talcum powder and prickly heat powder, as children usually have the habit of sucking or chewing their fingers, which results in children being poisoned by accidentally eating lead powder. In some areas, red or yellow powder is not regularly used after children are 6 to 7 years old. The prickly heat powder produced by some manufacturers also contains Gong powder (alkaline lead carbonate powder), which is also easy to lead to serious lead poisoning after children use it. Bad habit three: using lead-containing prescriptions Representative areas: Henan, Shandong, Hebei, Inner Mongolia and northeastern provinces Traditional medicine believes that lead compounds have the effect of stopping fright, carbuncle and astringency, and can be used to treat children’s vitiligo, psoriasis, eczema, red buttocks, skin erosion, oral disorders, epilepsy, chronic diarrhea and other diseases. Therefore, in many parts of the country, it is the custom to use lead-containing prescriptions to treat the above diseases, especially in Henan, Shandong, Hebei, Inner Mongolia and the northeastern provinces, where it is the traditional custom to use lead compounds to treat children’s mouth ulcers and thrush, or to use red tannin powder with sesame oil to apply externally for anti-inflammatory purposes when the mother has mastitis during the breastfeeding period, resulting in children being poisoned by accidentally swallowing lead compounds. Special reminder: Families living in the above-mentioned vast areas should take their children to have their blood lead tested early if they have the above-mentioned habits or have used the above-mentioned prescriptions for their children.