Why does old age spot grow on the face?
summary
Senile plaques, known as "senile pigmented plaques", also known as seborrheic keratosis in medicine. It refers to a kind of lipofuscin pigmented plaque on the skin of the elderly. It usually appears on the face, forehead, back, neck, chest, etc., sometimes it may also appear in the upper limbs and other parts. After entering 60-70 years old, with the growth of age, the number and area of senile plaques can gradually increase. So, how does senile plaque come into being? At present, there are three versions.
Why does old age spot grow on the face?
After aging, the metabolism of cells can decrease, and the body fat is easy to be oxidized to produce senile pigment. This pigment can not be discharged from the body, so it is deposited on the cell body, thus forming senile plaques.
After aging, the metabolism of the body begins to decline, the decline of cell function is accelerating year by year, and the blood circulation tends to be slow. Coupled with the changes in the diet structure of the elderly and the imbalance in the proportion of animal and plant fat intake, a very small brown particle called lipofuscin accumulates in the basal layer cells of the skin. The brown particles are the product of lipid peroxidation. Aging tissue cells lose their function of decomposition and rejection, resulting in excessive accumulation of brown particles in the basal layer of local cells, thus forming age spots on the surface of human body.
It is the result of the long-term toxicity of free radicals and their induced peroxidation reaction to organisms.
matters needing attention
In the young and middle-aged period, there are natural antioxidants and antioxidant enzymes in the body. These antioxidants can change free radicals into inert compounds, and can not produce lipid peroxide, so they can not damage cells. However, with the growth of age, the antioxidant function of the body gradually decreases, and the free radicals in the body will play a destructive role in old age. It is generally believed that senile plaque is a kind of aura of tissue aging, indicating that cells have entered the aging stage. Lipofuscin pigment not only accumulates on the skin, but also invades the body. If it is deposited on the wall of blood vessels, it will lead to vascular fibrosis, arteriosclerosis, hypertension and myocardial infarction; Accumulation in brain cells, affect brain function, thus speeding up the process.
