Many causes can lead to dizziness and weakness: 1, for example, because of heart disease, arrhythmia, chronic cardiac insufficiency, resulting in a reduction in the ejection of blood from the heart, which can lead to a stage of insufficient energy supply to the tissues of the whole body, patients will have dizziness, weakness, weakness, panic, chest tightness; 2, some chronic diseases, such as diabetes, chronic renal insufficiency, anemia, hypertension or hypotension, can also lead to dizziness and weakness. Some chronic diseases, such as diabetes, chronic renal insufficiency, anemia, hypertension or hypotension, may also cause dizziness and weakness; 3. Vestibular neuronitis.