Stabbing pain in the left side of the abdomen is a relatively common clinical symptom, the specific causes may include the following: the first reason, the most common colorectal inflammation, these inflammatory diseases can lead to intestinal spasmodic pain, sometimes accompanied by abdominal pain, diarrhea, as well as nausea, vomiting, and other digestive symptoms, the emergence of these symptoms should be promptly to the hospital. The second reason may be due to urinary stones, especially the left ureteral stone, because the stone to the bladder in the process of sliding down easily stimulate the left side of the ureter, resulting in renal colic or even hydronephrosis with frequent urination, urinary urgency and other painful symptoms. The third reason may also be the female pelvic inflammatory disease, including the left fallopian tube and other inflammation, tumors, torsion and ovarian rupture, etc. can appear in the left side of the abdominal pain.