Introduction: The surgical removal of impacted mandibular third molar is associated with minor but expected complications like pain, swelling, bruising and trismus. The lingual nerve damage sometimes occurs after the removal of mandibular third molar producing impaired sensation or permanent sensory loss. Hence: the present study was undertaken for determining the clinical incidence of lingual nerve injury following mandibular third molar removal and to analyze possible factors for the lingual nerve injury. Material and methods: A total of 200 patients who underwent extraction of mandibular third molar through surgical procedure were included. Complete demographic and clinical details were obtained. Incidence of lingual nerve paraesthesia was recorded. All the results were recorded and analysed by SPSS software. Results: A total of 200 patients were assessed. Out of these two patients reported Lingual nerve paraesthesia that was temporary and one patient reported permanent lingual nerve paresthesia. There was no patient reporting with temporary and permanent inferior alveolar nerve paraesthesia. Conclusion: It was concluded that the factors leading to temporary or permanent paraesthesia is actually difficulty of extraction. Other parameters like operator’s seniority, age and medical condition of the patient, gender, level of impaction, type of flap and the tooth side in relation to the handedness of the operator had minimal effect on the outcome. Key words: Lingual nerve injury, Sensory impairment, Third molar extraction