The specific causes of dizziness, palpitations and nausea are as follows: 1. Physiological: strenuous exercise, severe insomnia, coffee and strong tea consumption can cause palpitations and dizziness symptoms; 2. Pathological: divided into cardiovascular and non-cardiovascular aspects factors. Non-cardiovascular secretory factors include anemia, hyperthyroidism, etc. In addition, cervical spondylosis can cause insufficient blood supply to the brain, sympathetic excitation, sympathetic nerve abnormalities, which can also cause dizziness, palpitations and nausea. Cardiovascular diseases, such as heart problems and arrhythmias can cause palpitations. Inadequate blood supply to the brain can lead to dizziness and nausea.