Stabbing pain in the left side of the abdomen is a relatively common symptom in clinical practice, and the specific causes may include the following: the first cause, the most common inflammation of the colorectum, these inflammations can lead to intestinal spasmodic pain, sometimes accompanied by abdominal pain, diarrhea, as well as nausea, vomiting and other gastrointestinal symptoms, when these symptoms appear, you should promptly go to the hospital. The second cause may also be due to urinary stones, especially left ureteral stones, as they tend to stimulate the left ureter in the process of sliding down the bladder, resulting in renal colic or even hydronephrosis with painful symptoms such as frequent and urgent urination. The third cause may be inflammation of the pelvis in women, including inflammation of the left fallopian tube, tumors, torsion and rupture of the ovary, which can cause stabbing pain in the left side of the abdomen.