The term “dizziness” is a common term, not a specialized medical term, and similar terms in China include dizziness, and “confusion” is commonly used in the Northeast and Beijing. Specifically, there are four types of dizziness: First, pre-syncope syndrome, which is similar to the feeling when standing up suddenly after squatting on the ground for a long time, dizziness, blurred vision, limb weakness, unstable standing. In severe cases, blackness in front of the eyes, loss of consciousness, falling to the ground, pale face. A part of patients have nausea, epigastric discomfort, panic, sweating and other manifestations during the attack. The symptoms can be rapidly improved by adopting a flat position during a pre-syncopal episode. In most cases, pre-syncope syndrome is related to physical fitness, i.e., it is mostly seen in thin, tall young women who lack exercise. However, acute massive bleeding, heart disease, etc. can also cause syncope and these risky conditions should be excluded first. Acute massive blood loss is generally ruled out first, especially in gastrointestinal bleeding (gastric bleeding, etc.), where there are often no other signs of bleeding before vomiting blood or passing black stools, which can be easily ignored. If there is no hemorrhage, further neurology will be consulted to determine the pre-syncope syndrome or syncope, and then further tests will be performed to rule out cardiac causes. If the cause is determined to be cardiac, then cardiovascular medicine will be required. Secondly, vertigo: during the attack, you feel that the sky is spinning, and therefore do not want to open your eyes, often accompanied by nausea, vomiting, panic and sweating. It cannot be completely relieved by resting in bed. It may be accompanied by tinnitus, hearing loss, and a feeling of blockage. The most common cause is otolaryngitis, which is a benign form of vertigo with no significant risk. It usually appears after getting up, lying in bed or turning over or leaning over, disappears within seconds to tens of seconds, recurs repeatedly, and can usually be relieved automatically within 4 weeks. The diagnosis can usually be established by special examination in the ENT department. However, in middle-aged and elderly people, especially those with hypertension, diabetes, coronary heart disease, cerebral infarction, etc., sudden vertigo may be a manifestation of stroke and requires urgent medical attention. Third, the feeling of imbalance is a feeling of unstable standing and walking, similar to the feeling of a person who is afraid of heights standing on a tall building or a cliff looking down. If you are normally healthy and suddenly experience a feeling of imbalance, you should be aware of the possibility of a stroke and seek urgent medical attention. However, elderly people, especially those with hearing or vision loss, and those with previous illnesses in the brain, spinal cord, or nerves, will have a mild to moderate sense of instability for a long time, and the greatest danger is in falls causing fractures, etc. It is best to use a cane for safety. Some patients with anxiety may also have a sense of imbalance, especially in open halls or squares, called “square fear”. You can consult the psychology department. Fourth, general dizziness, dizziness, head heavy, head swelling, slight headache, head tightness, etc., feel the head is not fresh, usually accompanied by restlessness, impatience, sleepiness, insomnia, memory loss, inattention, work efficiency decline. It is common in hypertension, anemia, cold, fever, hangover after drinking, insomnia, sleep apnea, and anxiety and depression, cervical spondylosis, etc. Generally, there is no major risk. While it is important to treat the original disease, it is also important to understand the disease correctly, eliminate concerns and relax.