人到老年,面部或手背、手臂上常出现一些扁平或稍稍隆起的斑点或斑块,呈淡褐色、褐色或黑色,不痛不痒。这就是人们俗称的老年斑、寿斑,医学上称做老年疣或脂溢性角化病。老年斑是因皮肤角质细胞成熟迟缓所致的一种良性的表皮增生性肿瘤。现代医学认为,老年人细胞代谢机能减弱, When the person is old, there are often flat or slightly raised spots or plaques on the face or back of the hand or on the arm. It is light brown, brown or black, and it is superficial. This is known as senile plaques and plaques. It is medically known as senile hemorrhoids or seborrheic keratosis. Age spots are a benign epidermal hyperplasia due to the slowness of skin keratinocyte maturation. Modern medicine believes that the elderly’s cell metabolism is weakened.