人到老年,颜面两侧、颈项、手背、上肢等暴露部位常会出现大小不等、形状不一的棕黑色斑点——老年斑。随着年龄的增加,斑点的数目逐渐增多,面积也有所扩大,这是人体衰老的外在表现之一。虽然随着年龄的增加,身体各个器官都渐渐趋向衰老,但皮肤的老化是最容易被观察到的。例如,皮肤的皱纹逐渐增多、加深;皮肤的弹性减弱,变得菲薄;毛发变白;皮脂腺的 People to the elderly, the face on both sides, neck, back of the hand, upper extremities and other exposed parts often appear in different sizes, brown and black spots of different shapes - age spots. With age, the number of spots gradually increased, the area has also been expanded, which is one of the external manifestations of human aging. Although with aging, all organs of the body are gradually aging, but the aging of the skin is the most easily observed. For example, skin wrinkles gradually increased, deepened; skin elasticity weakened, become meager; hair white; sebaceous