Dizziness and nausea one month after atrial fibrillation ablation may be due to insufficient cerebral blood supply or malnutrition. It can be relieved by examination and dietary guidance. 1. Examination: dizziness and nausea one month after atrial fibrillation ablation may be caused by insufficient cerebral blood supply, which can be examined by cranial CT and MRI. 2. Dietary guidance: Post-operative diet is mainly based on light diet, eat more food rich in protein and vitamins, such as fish, shrimp, more vegetables and fruits, such as tomatoes, apples and so on. Avoid eating spicy and stimulating food. If dizziness and nausea occur one month after atrial fibrillation ablation and continue to be unrelieved, you should seek medical treatment in time and under the formal guidance of the doctor.