吸烟者最先受到危害的部位就是口腔。上、下唇外侧是直接接触香烟的部位。早在1739年就有医学专家认为,吸烟,特别是用烟斗、水烟吸烟,是唇癌的主要致病原因。上、下唇粘膜受香烟燃烧时的灼伤和致癌物质长期刺激,局部可形成烟白斑。烟白斑再经过长期刺激,可发生癌变。唇癌好发于下唇粘膜交界处,男性比女性发病率高20倍。因而认为唇癌与抽烟有直接关系。香烟燃烧时产生1200余种有害成分,其中许多具有强烈致 Smokers first harmed site is the mouth. On the outside of the lower lip is the site of direct contact with cigarettes. As early as 1739, some medical experts believe that smoking, especially smoking with pipe and hookah, is the main cause of lip cancer. Upper and lower lip mucosa burning by burning cigarettes and carcinogens long-term stimulation, the local can form smoky spot. After long-term white smoke smoked, can occur cancer. Lip cancer occurs in the lower lip mucosal junction, the incidence of male than female 20 times. So that lip cancer is directly related to smoking. Cigarette burning produces more than 1200 kinds of harmful ingredients, many of which have a strong cause