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Periodontitis is a multifactorial inflammatory disease and is one of the leading causes of tooth loss worldwide. While dental plaque remains the primary etiological factor, several modifying factors influence the severity and progression of periodontal destruction. Among these, parafunctional habits such as bruxism, tongue thrusting, mouth breathing, lip biting, and nail biting play a significant role. These habits exert abnormal mechanical forces on the supporting periodontal structures, leading to occlusal trauma, increased tooth mobility, widening of the periodontal ligament space, alveolar bone loss, and deepening of periodontal pockets. Here in our narrative review, we are going to discuss the role of parafunctional habits in periodontal disease.