Hi. Thanks for your query. Noted the history and understood your concerns. Such a momentary tightness in the middle of stomach that lasts for 3-4 minutes and comes in a while with sweating but without any other symptoms can be due to the following reasons: Volvulus of stomach. Colon spasm. This can be diagnosed by the following: Clinical evaluation by a General Surgeon. Barium meal in head-down position can elicit the volvulus opf stomach CT scan of the abdomen. Once diagnosed the cause, treatment can be done accordingly. But remember anything that occurs occasionally is difficult to find and you may need repeated tests and clinical examinations till the cause is found. This is painstaking. Take laxatives to have soft stools and not allow constipation to occur.