人的牙龈多为粉红色,鲜嫩有光泽。经常与重金属打交道的工作人员,虽然身体没有不适,但只要定期仔细观查牙龈颜色的变化,就会早期发现是否患了重金属慢性中毒。长时间与汽油、油漆、橡胶、颜料等化学物质有接触的工作人员,慢性铅中毒的可能性最大。如在充沛的阳光下,对着镜子观察牙龈色素是否变深, People’s gums are mostly pink, fresh and shiny. Often dealing with heavy metals staff, although the body is not uncomfortable, but as long as regularly check the changes in color of the gums, it will be early detection of chronic heavy metal poisoning. For a long time with gasoline, paint, rubber, paint and other chemicals have contact with staff, the most likely chronic lead poisoning. Such as in the abundant sunshine, in the mirror to observe whether the dark gums,