Background: The most frequent complication which follows the removal of impacted mandibular third molars is ‘dry socket’ or Alveolar Osteitis (AO). The present study aimed to evaluate the incidence, risk factors (age, sex, infection) contributing to the development of dry socket and clinical feature following surgical removal of impacted mandibular third. Material & Methods: The present study was conducted in 86 adult patients requiring surgical extraction of impacted mandibular third molar. The surgery was performed in a standardized technique. Patients were recalled regularly and symptoms and signs of dry socket was noted if developed. Patients were reviewed at 3rd and 7th day of surgery. Results: Out of 86 patients, 46 were males and 40 were females. Out of 46 males, 5 and out of 40 females, 4 developed dry socket. Age group 18-30 had 2 dry socket, 30-50 had 2 and >50 years had 5 cases of dry socket. The difference among both genders was significant in age >50 years (P< 0.05). The incidence of DS was in 7 patients suffering from systemic diseases and 2 medically fit patients developed dry socket. Postoperative symptoms such as pain, empty socket, bare bone and halitosis on 3rd and 7th day. There was significant reduction in symptoms on 7th day. Conclusion: Dry socket is multifactorial in nature. Authors found that higher number of dry socket was in age group >50 years, in males and in patients with systemic diseases. Need of the Study: Assessment of risk factors may be useful in preventing complications arising from mandibular third molar extraction.