Many diseases can cause dizziness, nausea and weakness. 1. cerebral hemorrhage and cerebral infarction, especially lesions of the cerebellum and brainstem can cause dizziness, but most of them are persistent, and dizziness can be mild or severe, accompanied by other symptoms such as slurred speech, weakness of limbs and numbness of limbs. 2. otoliths, also called benign paroxysmal positional vertigo, is mostly dizziness in a specific direction, with rotating vision, which can be relieved instantly or by changing position. 3. 3. Meniere’s disease can also be associated with dizziness, nausea, and weakness, and is often accompanied by tinnitus and hearing loss. 4. Vestibular neuronitis can also cause dizziness, but this disease is preceded by a history of infection, such as respiratory tract infection, diarrhea, etc., followed by intense dizziness, visual rotation, nausea, and vomiting. Due to the severity of dizziness, patients may feel weak. 5. In addition, anemia and liver and kidney diseases, sometimes also have symptoms of dizziness, nausea and weakness, so further improvement of relevant examinations is needed to clarify the diagnosis.