In autumn, the air humidity is low and the climate is dry, which aggravates the loss of water on the face, the imbalance of skin water and oil, and the damage to the stratum corneum, which makes the skin unable to exert a good water-locking ability.
Metabolism slows down
When the temperature drops in autumn, the capillaries of the human body will shrink, the blood flow rate will slow down, so the metabolism rate will also slow down, and the secretion of sweat glands and sebum will decrease.
Decreased production of sebum film
As the weather cools, sebum production decreases relatively, resulting in insufficient sebum film to help the skin retain moisture.