Slow thinking is a symptom of depression. Slow thinking: inhibition of thought association process, slow reaction, self-consciousness that the brain does not turn, manifested by a decrease in active speech, a significant slowdown in the speed of speech, effortful thinking problems. Slow reaction, need to wait for a long time, under the influence of low mood, low self-esteem, low self-esteem, a sense of uselessness and worthlessness, feeling that living is meaningless, pessimistic and suicidal intentions, self-blame and self-guilt, thinking that living becomes a burden, committing a major crime, the emergence of suspicion on the basis of physical discomfort, thinking that they are suffering from an incurable disease. So, how to check for slow thinking? The following is the examination method of slow thinking: 1, loss of interest, no sense of pleasure; 2, energy loss, often have no reason to feel tired; 3, slow reaction, or emotional easily excited, hyper, also easily provoked; 4, self-evaluation is too low, often self-blame or a sense of guilt, which is also the main cause of suicide; 5, association difficulties or conscious thinking ability decreased, the small things of daily life 6. recurrent thoughts of death or suicidal or self-injurious behavior; 7. sleep disorders, such as insomnia, early awakening or excessive sleep (according to research, 80% of depressed patients have sleep disorders); 8. reduced appetite or significant weight loss; 9. decreased sexual desire. In addition to the above symptoms, depression has some peripheral symptoms. In Asia, especially in China and Japan, most depressed patients do not have mainly emotional symptoms, but rather somatic symptoms such as headache, dizziness, bloating, palpitations, and body pain. Therefore some somatic symptoms for which no physical cause can be identified should also be considered for possible depression to avoid delaying treatment.