Many people experience headaches, dizziness, nausea, and other discomforts in their daily lives. There are two common categories of causes for them: organic lesions and non-organic lesions. 1. Common non-organic lesions: mental stress and fatigue can cause a decrease or disorder of brain function and symptoms such as dizziness and nausea. Long-term high mental tension and physical fatigue also tend to aggravate tinnitus. When patients take certain drugs for certain diseases, they can experience headache, dizziness and nausea. Also, coffee and alcohol can aggravate tinnitus and cause dizziness and headache. 2. Organic lesions: cerebrovascular diseases (cerebral infarction, cerebral hemorrhage), severe anemia, hypertension or hypotension, hypoglycemia, some inner ear diseases, cervical spondylosis, etc. can cause headache, dizziness, and nausea. There are also traumatic brain injury, brain tumors, certain epilepsy,, advanced coronary heart disease, and colds that can occur. The most common conditions are inadequate blood supply to the basilar artery and cervical spondylosis. Organic lesions must be given high priority. For non-organic lesions, self-regulation alone is required to relieve symptoms. For organic lesions, specialized treatment in a hospital is required.