1 Localized pain: This is pain found in only one area of your belly. It is more likely to be a sign of a problem in an organ, such as the appendix, gallbladder, or stomach.  Cramp-like pain: This type of pain is not serious most of the time. It is likely to be due to gas and bloating, and is often followed by diarrhea. More worrisome signs include pain that occurs more often, lasts than 24 hours, or occurs with a fever.
https://medlineplus.gov/ency/article/003120.htm
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http://www.webmd.com/pain-management/tc/abdominal-pain-causes-topic-overview
1 Abdominal pain can be acute or chronic and include sharp pain as well as dull pain.  The location of the abdominal pain may be in the upper right or left side (quadrant), lower right or left side, and upper, middle, and lower.
http://www.emedicinehealth.com/abdominal_pain_in_adults/article_em.htm
Peptic ulcer disease, or ulcers in the stomach and duodenum (the first part of the small intestine), is a common source of abdominal pain, says Dr. Alaradi. Pain usually strikes the mid-upper abdominal area and sometimes occurs after meals, he adds.
http://www.health.com/health/gallery/0,,20568290,00.html
1 If the pain becomes more severe, it may be caused by a blockage of the intestines.  Localized pain: This is pain found in only one area of your belly. It is more likely to be a sign of a problem in an organ, such as the appendix, gallbladder, or stomach.
https://medlineplus.gov/ency/article/003120.htm
Abdominal Pain Causes and Location (Right, Left, Lower, Upper) Abdominal pain is caused by. 1  inflammation (appendicitis, diverticulitis, colitis), 2  by stretching or distention of an organ (for example, gallstones, hepatitis), or.  by loss of the supply of blood to an organ (for example, ischemic colitis).
http://www.emedicinehealth.com/abdominal_pain_in_adults/article_em.htm
Abdominal pain is the feeling of pain in a person's stomach, upper or lower abdomen, and can range in intensity from a mild stomach ache to severe acute pain.
http://www.emedicinehealth.com/abdominal_pain_in_adults/article_em.htm
Abdominal pain, also known as stomach pain, is a common symptom associated with both temporary, non-serious disorders and more serious conditions. Common causes of pain in the abdomen include gastroenteritis and irritable bowel syndrome. In a third of cases the exact cause is unclear. About 10% of people have a more serious underlying condition such as appendicitis, leaking or ruptured abdominal aortic aneurysm, diverticulitis, or ectopic pregnancy.
https://en.wikipedia.org/wiki/Stomach_ache
1 Causes of symptoms of abdominal pain vary and may include gallbladder disease, ulcers of the stomach, food poisoning, diverticulitis, appendicitis, cancers, female diseases or problems (for example, fibroids, cysts, STDs), and vascular problems.  Some women experience abdominal pain during pregnancy.
http://www.emedicinehealth.com/abdominal_pain_in_adults/article_em.htm
1 Cramp-like pain: This type of pain is not serious most of the time. It is likely to be due to gas and bloating, and is often followed by diarrhea. More worrisome signs include pain that occurs more often, lasts than 24 hours, or occurs with a fever.  Colicky pain: This type of pain comes in waves.
https://medlineplus.gov/ency/article/003120.htm
what causes.stomach aches
Gastroenteritis and irritable bowel syndrome cause stomach ache. Gastroenteritis and irritable bowel syndrome causes stomach aches.