What are the causes of skin aging?

The causes of skin aging include: 1. Age factor: skin aging generally starts from about 30 years old, which is the only factor that cannot be prevented;2. Health factor: when suffering from chronic diseases such as kidney disease, liver disease, gynecological disease, etc., skin is more prone to aging;3. Environmental factor: long-term sun exposure, wind and rain or seawater erosion, skin is prone to aging;4. Mental factor: excessive brain use, excessive thinking, mental tension, mood depression, skin aging; 5, nutritional factors, living habits, endocrine disorders, improper skin care, improper medication can cause skin aging.