Abdominal pain is referred as a pain that occurs between the chest and pelvic regions. It could be mild or severe and it may be continuous or come in waves. The abdominal pain may take the form of crampy, achy, dull, intermittent or sharp pain. 

Acute abdominal pain can be defined as severe, persistent pain of sudden onset. The pain may frequently be associated with nausea and vomiting, abdominal distention, fever and signs of shock. One of the most common conditions associated with acute abdominal pain is acute appendicitis or pelvic inflammatory disease. If the pain in abdomen area last more than three months, it is considered as chronic abdominal pain.

The condition is caused by inflammation or diseases affecting organs in abdomen area, but pain may also be felt in the abdomen even though it is arising from organs that are close to, but not within, the abdominal area (lower lungs, kidneys, uterus or ovaries). The causes are diagnosed on the basis of the characteristics of the pain, physical examination, and testing. Occasionally, surgery is necessary for diagnosis. Treatment depends on cause of the pain. 

Endometrial cancer

Endometrial cancer is a cancer that arises from the endometrium. It is the result of the abnormal growth of cells that have the ability to invade or spread to other parts of the body. The uterus may become enlarged or the cancer may spread, causing lower abdominal pain or pelvic cramping.

Testicular cancer

Testicular cancer is cancer that develops in the testicles, a part of the male reproductive system. One of the symptoms of the disease include dull ache in the lower abdomen or groin.

Hydrosalpinx

A hydrosalpinx is a distally blocked fallopian tube filled with serous or clear fluid. Symptoms can vary from lower often recurring abdominal pain or pelvic pain to asymptomatic disease.

Bicornuate uterus

A bicornuate uterus or bicornate uterus, commonly referred to as a "heart-shaped" uterus, is a uterus composed of two "horns" separated by a septum. In humans, a bicornuate uterus is a type of uterine malformation. The symptoms could be heavy or irregular menstruations, abdominal pain and painful ovulation. 

Ovariectomy

Ovariectomy, also called oophorectomy, is the surgical removal of an ovary or ovaries. In rare cases, ovariectomy can be used to treat endometriosis by eliminating the menstrual cycle, which will reduce or eliminate the spread of existing endometriosis as well as reducing the abdominal pain. 

Mumps

Mumps, also known as epidemic parotitis, is a viral disease caused by the mumps virus. Acute pancreatic inflammation in about four percent of cases, manifesting as abdominal pain and vomiting

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Sources

Testicular cancer ―sourced from Wikipedia licensed under CC BY-SA 3.0
Hydrosalpinx ―sourced from Wikipedia licensed under CC BY-SA 3.0
Oophorectomy ―sourced from Wikipedia licensed under CC BY-SA 3.0
Endometrial cancer ―sourced from Wikipedia licensed under CC BY-SA 3.0
Abdominal pain ―sourced from Wikipedia licensed under CC BY-SA 3.0
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