Hello, First of all, it’s a very positive step that you have stopped using tobacco and gutkha. Please make every effort not to restart, as continued tobacco use significantly increases the risk of oral precancerous and cancerous lesions. From the photograph, the blackish spot appears to be a localized pigmented lesion, but it is not possible to make a definitive diagnosis from an image alone. It could be due to benign pigmentation, a small traumatic bruise, smoker’s melanosis, or deposition of tobacco-related pigments. However, because of your history of tobacco and gutkha use, any new pigmented lesion should be examined clinically by an Oral Medicine & Radiology specialist or an Oral and Maxillofacial Surgeon. If the spot persists for more than 2 weeks, increases in size, changes in color or shape, becomes painful, ulcerates, or starts bleeding, further evaluation, including a biopsy if indicated, may be required.