Hi. Thanks for your query. Noted the history of chronic stomach problem, flare ups, with symptoms of infection like bloating, gases, digestive woes etc, scheduled visit to a Gastroenterologist tomorrow but wants to know about a circular mole-like black lesion on the inside left cheek and whether this is connected with stomach infection. Since there is an intestinal infection, I would advise you the following: Clinical evaluation by your Doctor for vitals and local examination. Investigations of stool, blood, ultrasonography and as required. A course of an antibiotic, metronidazole and probiotic should help you fully. The black mole like structure on the inside of left cheek can be a benign mole or can be a malignant melanoma. Since this is small it is better to to get the lump excised for two reasons: 1. you get rid of the extra mass out of body and 2. You get a confirmed diagnosis by histopathology .