- When exposed to external stimuli such as direct sunlight or warm air for a long time ,the skin temperature rise. As the skin temperature increases ,the skin increases sweat secretion and sebum secretion to lower the temperature ,which causes skin oily.
- Long-term dilation of capillaries due to hight temperature can result in permanent capillary dilatation and flushing.
- Chronic increase in skin temperature causes a decrease in collagen and dermal components in the dermis, and increases the inflammatory cells in the dermis, thereby reducing the elasticity of the skin.