Fainting is medically called syncope. When you faint, even if you wake up soon and feel nothing, you should not take it lightly. Because sometimes syncope is caused by a disease, it is only by finding potential health risks that you can avoid the next syncope. What needs to see a doctor? Most of the causes of syncope are not what’s major problems and do not require special treatment. However, if you suddenly have syncope, it is recommended to see a doctor as soon as possible so as not to delay your illness. Special attention should be paid to the following situations: syncope for the first time; Repeated syncope; Injury caused by syncope; Pregnant women; Anemia patients; Diabetes patients; Patients with heart disease; Before you lose consciousness, you have symptoms such as chest tightness, arrhythmia or severe heartbeat. Incontinence of urine and feces; The loss of consciousness lasts for several minutes or more. Related examinations When you see a doctor, The doctor will specifically ask you if you have syncope in what’s case. For example, at that time, we were doing what and the surrounding environment was what. At the same time, The doctor will also advise you to have other tests. Electrocardiogram If the doctor thinks that your syncope is caused by heart problems, He will suggest that you have an electrocardiogram. Electrocardiogram is a simple and painless examination. It usually takes five minutes. During the examination, The electrode pieces will be pasted on your hands, feet and chest respectively. These electrode pieces will transmit the [bioelectric] activity of your heartbeat to the screen. Shown as a twisted line, The doctor can see if your heart is abnormal by looking at the images. Carotid sinus test If the doctor thinks that your syncope is related to carotid sinus syndrome, He will massage your carotid sinus to see if you will regain syncope or feel dizzy. This examination is called the carotid sinus test. The carotid sinus is the bulge at the beginning of the internal carotid artery. There are baroreceptors in the arterial wall, Can feel the change of blood pressure, In turn, blood pressure is controlled through nerve conduction. If syncope or dizziness occurs after massage, Then your syncope is likely to be caused by carotid sinus syndrome. Blood examination Sometimes the doctor will recommend you to take blood for examination. It is usually to eliminate diseases such as diabetes or anemia. Other examiners will also take care of you when you are lying down and when you are standing, Take your blood pressure twice. If your blood pressure is significantly lower when you stand up than when you lie down, then you may have postural hypotension. After the diagnosis of postural hypotension, you may need to do a series of tests to determine the cause of postural hypotension. The doctor will also ask you some further questions, such as the history of taking drugs, because taking some drugs can cause postural hypotension.