Tummy pain like knife scraping may be peptic ulcer, appendicitis, cholecystitis, acute pelvic inflammatory disease, urinary stones and other causes. 1. Peptic ulcer: because the gastric mucosa is damaged by the presence of ulcers, gastric acid secretion is more, stimulate the ulcer surface caused by stomach pain like knife scraping, accompanied by acid reflux, nausea, abdominal distension and other symptoms. 2. appendicitis: appendix cavity obstruction triggered by inflammation, inflammatory media will stimulate the cecum and lead to stomach pain like knife scraping, the pain is usually in the right lower abdomen, accompanied by abdominal muscle tension, rebound pain and other symptoms. 3. Cholecystitis: Inflammation of the gallbladder or gallbladder stones in combination, in the acute attack, resulting in pain in the upper right abdomen, like a knife scraping, can be accompanied by nausea, vomiting, fever and other symptoms. 4. Acute pelvic inflammatory disease: acute inflammation of the pelvic cavity causes congestion, stimulation of the lower abdomen causing stomach pain, also like a knife scraping, accompanied by lumbosacral pain, leukorrhea, leukorrhea odor and other symptoms. 5. urinary stones: for example, ureteral stones, kidney stones, stones in the movement can lead to stomach pain, like knife scraping, usually in the abdomen pain. Tummy pain like knife scraping, may also be caused by other diseases, it is recommended to immediately seek medical attention without delay, identify the cause of the disease and follow the doctor’s instructions for treatment.