A 54 yr female patient with uncontrolled diabetes reported to the Department of Periodontics with a chief complaint of unhealed extraction socket in relation to tooth # 25 [Figure 3A]. The patient had undergone an extraction of tooth # 25 15 days back. Since then, patient noticed pain, multiple boil/s, and mobility in the adjacent teeth. The patient also had the history of Covid-19 infection two months back but was not hospitalised. CBCT findings revealed complete opacification of the left maxillary sinus with palatal perforation on the same side with respect to teeth # 25 and 26 regions. The roof of the maxillary sinus was intact on both the left and right sides.