Stomach pain is not all that uncommon. In most cases, it is clearly related to something you either ate (such as with food poisoning), caught (like the stomach flu), or experience routinely (such as gastritis). At other times, it can seem as though it appears out of the blue. If this happens and the symptoms are either severe, persistent, or worsening, you need to see a doctor to investigate the cause.Several different adjectives may be used to describe one's stomach pain—burning, stabbing, aching, and so one—and the discomfort is sometimes associated with other symptoms like nausea, vomiting, and excessive gas. This information can be helpful to your doctor when working to make a diagnosis.