COVID-19 pandemic has traumatized deep inside in minds and lives of human beings. Those who have survived are at risk of many post-COVID complications; mucormycosis being one of the most common as well as morbid infections. Mucormycosis is also known as black fungus, it is a life-threatening opportunistic fungal infection. Inoculation occurs by inhalation of spores in nose, paranasal air sinuses and in lungs. Mucormycosis is often associated in patients with compromised immunity and it presents with characteristic black necrotic eschar and necrosis. Disease affecting the facial region possess a challenge because it often disseminates with sino-orbital and cranial involvement at the time of diagnosis. Dental practice occasionally encounters unusual and subtle symptoms with non-pathognomonic clinical signs of several fatal diseases which may pretend like a common oral disease. Hence, the key knowledge to oral and primary care physicians and its precise application is necessary for the early diagnosis of such fatal infections to prevent untoward consequences in this COVID era. This article presents a case of mucormycosis with chief complaint of pain and swelling in right front tooth region, which mimicked as periodontal abscess in a patient, leading to delay in the diagnosis possess greater challenges during the treatment.