2. Busy and disorderly: irregular life and work, lack of sleep, sudden changes in long-term adaptation of stereotypes and habits, etc., will lead to excessive pressure, which will become the cause of neurasthenia.
3. Overuse of brain: Too long mental work time, too long work tasks, too heavy work tasks, and high concentration make brain nerve cells consume too much energy, lose normal regulation and are prone to neurasthenia.
4. excessive stress: intense mental stimulation, heavy mental burden, persistent environmental pressure and improper working methods make brain activities excessively tense, which exceeds the tolerance limit of the nervous system and may also become the cause of neurasthenia.
5. Bad environment: being in a noisy environment for a long time, the body and mind can't be peaceful, and rest and sleep can't be guaranteed; Long-term exposure to noise, dazzling light, pungent smell or polluted air will also damage the nervous system and become the cause of neurasthenia.
6. Sickness: Suffering from infectious diseases, chronic poisoning, craniocerebral injury or nutritional disorders, the resistance is reduced, mental stress or mental burden is generated, and the nervous system is often in a state of anxiety, which makes it the cause of neurasthenia for a long time.
7. Inner contradiction: Inner contradiction can't be solved for a long time, subjective desire doesn't conform to objective reality, and the nervous system is in a state of tension for a long time, which becomes chronic mental trauma, thus inducing neurasthenia.
8. Too monotonous: a certain amount of stimulation and tension are indispensable to the health of the body, and life and work are too monotonous, which leads to the nervous system being too lax, which is not suitable for brain hygiene and is easy to cause neurasthenia.