The most common complications after radiofrequency ablation include recurrence of arrhythmia, puncture site injury, thrombosis, bleeding and so on. 1. Recurrence of arrhythmia: after radiofrequency ablation, necrotic area will be formed in the ablation site and inflammatory edema area will be formed around it. If the lesion causing arrhythmia is not in the necrotic area but in the inflammatory edema area, the arrhythmia will recur again after the inflammation and edema subside. 2. Puncture site damage: radiofrequency ablation is an interventional method that requires vascular puncture, and hematoma, ecchymosis, or even pseudoaneurysm may occur at the puncture site. 3. Thrombosis: Radiofrequency ablation requires vascular puncture, and thrombosis may occur during compression after the procedure, resulting in symptoms of limb ischemia or bruising. 4. Bleeding: radiofrequency ablation in order to prevent thrombosis, generally routine oral anticoagulant and antiplatelet drugs, these drugs may lead to bleeding tendency, such as bleeding gums, nosebleeds and so on. Patients with cardiac arrhythmias treated with radiofrequency ablation must go to a regular hospital and choose carefully under the guidance of a specialist to avoid adverse consequences.