Too much mental stress may cause immune system disorders. For example, too much mental tension can lead to insomnia, loss of appetite, endocrine disorders and so on. 1. Insomnia: too much mental tension may affect sleep and lead to insomnia, long time sleep quality is poor, may cause immune system disorders. 2. Loss of appetite: too much mental stress may lead to loss of appetite, reduced food intake and nutritional deficiencies, which may affect the immune system. 3. Endocrine disorders: too much mental stress may affect the endocrine system, resulting in endocrine disorders, such as increased blood sugar, menstrual disorders, etc., which indirectly affects the immune system, resulting in immune system disorders. It is recommended that patients should maintain a good mood and go to the psychological outpatient clinic for treatment if necessary.