The incidence of depression is high, but people are often ashamed to admit that they have a mental illness and do not pay attention to it, resulting in poor treatment results at a later stage. In fact, depression mainly changes people’s mood, but does not affect their intelligence and physical development. Therefore, patients suffering from depression do not need to worry, as long as they are actively treated, they can live and work normally. Many people are not unfamiliar with depression, but depression is fundamentally different from general unhappiness, and it has obvious characteristics. 1, depression has exclusively three main symptoms, which is the diagnostic criteria of depression. Combined, there are three main symptoms, which are depressed mood, slowed thinking and motor inhibition. (1) depressed mood: is not happy, always sad, even pessimistic despair. (2) Delayed thinking: the patient feels that his or her brain is not working well, cannot remember things, and has difficulty in thinking about problems. The patient feels that the brain is empty and dumb. (3) Motor inhibition: the patient is inactive and lazy. (3) Motor inhibition: The patient is inactive and lazy, walks slowly, and speaks little. In severe cases, the patient may not eat or move and cannot take care of himself/herself. However, it is not common for patients to have the above typical symptoms at the same time. Other symptoms of depression Depression is often accompanied by depressed mood, anxiety, loss of interest, lack of energy, pessimism, low self-esteem, etc. These are all common symptoms of depression, and sometimes it is difficult to distinguish them from the general short period of bad mood. Here is an easy way to introduce to you: if the above discomfort is serious in the morning and partially relieved in the afternoon or evening, then it is more likely that you are suffering from depression. This is the rhythmical change of depression called day heavy and night light. 3. Somatic symptoms of depression – the most likely symptom to cause misdiagnosis Somatic symptoms are relative to mental symptoms, that is, physical discomfort. Although depression is a mental illness, many patients have physical discomfort: such as dry mouth, constipation, loss of appetite, indigestion, palpitations, shortness of breath and chest tightness. It is generally more common in elderly patients. These patients are often seen in the general outpatient clinic of a general hospital and all laboratory tests show normal. If you or your parents or family members feel unwell and no other organic disease can be detected, it is recommended that you go to a specialist hospital and perhaps a psychiatrist will help you recover as soon as possible. 4.Suicide caused by depression – the most dangerous symptom Patients with depression are depressed and pessimistic due to their depressed mood. In severe cases, it is easy to have suicidal thoughts. And, because the patient’s thinking logic is basically normal, the success rate of implementing suicide is also higher. Since suicide occurs only when the disease has progressed to a certain level of severity. Therefore, early detection of the disease and early treatment are very important for patients with depression. Do not wait until the patient has already committed suicide to think that he may have depression.