Tummy cramps may be caused by pathologic reasons, such as: perforation of the digestive tract, intestinal obstruction, intestinal inflammation, etc., but they may also be caused by physiologic reasons, such as: too much mental tension, too low temperature, etc. 1. Pathological factors When patients have digestive tract perforation, large intestine perforation, etc., it will cause abdominal pain, slate abdomen, peritonitis and other symptoms, causing abdominal muscle tension, so the symptoms of stomach cramps will occur. Some patients have intestinal obstruction, gastric torsion, intussusception, intestinal inflammation, ureteral stones and other diseases, because of its more intense pain level, may also cause stomach cramps. 2. Physiological factors Some patients encounter too much mental tension, emotional fluctuations, alcohol and tobacco stimulation, low temperature and other situations, will cause strong contraction of the gastrointestinal cavity organs, causing spasmodic pain, which leads to stomach cramps. There are more reasons that can cause stomach cramps, if they exist for a long time, it is recommended to go to the hospital for a detailed examination to clarify the cause.