Radiofrequency catheter ablation is a preferred treatment method for cardiac arrhythmias in children due to its high success rate and low complication risk. We present an adolescent patient who underwent radiofrequency catheter ablation for Wolff–Parkinson–White syndrome and developed a skin burn at the site of the electrode patch. Skin burns can catastrophic consequences, especially in patients with life-threatening arrhythmias; therefore, clinicians should be aware of this complication.