There are many factors that cause mental depression, mental depression refers to the state of low mood and low energy. Long-term fatigue, lack of sleep may cause dizziness or fatigue, concentration, and over time, resulting in depressed mood and low energy. In addition, long-term work stress, anxiety, depression can also cause low spirits, low mood, while certain physical diseases, such as anemia, low blood pressure, diabetes, hyperlipidemia, hypothyroidism, can cause low mood. The presence of infections or chronic wasting diseases in the body can also cause a person to be in an undesirable mood. To adjust their mood through a good lifestyle, reasonable and balanced nutrition, scientific and moderate exercise, quit smoking and limit alcohol, regular work and rest, adequate sleep, psychological balance is also very important, most of the mental depression and unhealthy lifestyle is closely related.