I. Dizziness: The main manifestation of dizziness is mental fogginess, which is caused by a decrease in the function of the higher cortical nerve activity and is not related to the activity of the head, neck and trunk. In addition, there are also symptoms such as head heaviness, head boredom and insomnia, which are aggravated by stress and fatigue and reduced when the mood is happy and well rested. It is more common in patients with neurasthenia or chronic somatic diseases. Dizziness: The main manifestation of dizziness is intermittent light-headedness and wobbly gait, which is aggravated by walking, standing, sitting and lying movements or excessive eye use. What is dizziness? Dizziness is divided into the following categories: 1. Ocular dizziness, lack of clarity in seeing things, which is caused by visual impairment or eye muscle paralysis. Dizziness is aggravated by eye opening and excessive eye use, and is relieved or disappears when the eyes are closed; 2. Deep sensory dizziness, walking is like stepping on cotton, and there is a feeling of insubstantiality. It often occurs in activities such as walking, standing, sitting, etc. The symptoms disappear when these movements stop. In addition, the symptoms are aggravated when the eyes are closed or in a dark place and reduced when the eyes are open or in a bright place. 3. Cerebellar dizziness, which occurs in activities such as walking and standing, has an unsteady gait like drunkenness and has no effect on opening and closing the eyes, is different from the above-mentioned symptoms and is usually seen in patients with cerebellitis, vascular disease and trauma. Fourth, otolithic dizziness. This is caused by the dysfunction of the balance of the inner ear otoliths, and the symptoms will disappear after the above-mentioned movements are stopped, which is not related to the opening and closing of eyes. Third, vertigo: vertigo is mainly manifested as a sense of rotation, floating, drifting or tumbling. This condition is irregular and the duration of the attack varies, mainly caused by fatigue, excitement, insomnia, menstrual flow or excessive smoking and drinking. The condition is aggravated by opening the eyes during the attack and alleviated by closing the eyes and lying still, and is accompanied by spontaneous nystagmus, misorientation, directional tipping and nausea and vomiting.