This book provides essential information about the impacted third molars in a very simple presentation. It includes a discussion about its classifications, indications and contraindications of removal, as well as its management. It discusses the most common post-operative complications of third molar removal including pain, swelling, and trismus in terms of pathophysiology, methods of evaluation and various modalities taken to minimize these complications and to improve patients conditions postoperatively. As Cold therapy is our subject of focus, this book will enrich the reader with valuable information about the various effects of cold therapy on pain, swelling, and trismus. At the end the book will present a study that evaluates the effect of cold therapy on the postoperative complications of mandibular third molars removal.