The causes of frequent dizziness and nausea include anemia, hypertension, hypoglycemia and Meniere’s disease. 1. Anemia: Anemia can be caused by insufficient or reduced production of red blood cells, blood loss, etc. Unbalanced diet and bad eating habits can induce anemia, which can lead to headache, dizziness, nausea, bloating, tinnitus, fatigue and other manifestations. 2. Hypertension: dizziness, nausea, palpitation, arrhythmia, etc. will occur in hypertension. 3. Hypoglycemia: Hypoglycemia may cause dizziness, nausea, tremor, hunger, etc. When hypoglycemia occurs, glucose or candy can be taken orally immediately to avoid discomfort. 4. Ménière’s disease: recurrent episodes of rotational dizziness, tinnitus, ear fullness, nausea, vomiting and fluctuating hearing loss are the main features. In addition, frequent dizziness and nausea may also be vertebrobasilar ischemia, cerebral ischemia, otolithiasis, pregnancy reaction, etc. It is recommended to go to the hospital for relevant examinations to clarify the specific causes.